FZUS51 KBOX 210604
CWFBOX
Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EST Sun Dec 21 2025
Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM
ANZ200-211900-
104 AM EST Sun Dec 21 2025
.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres moves offshore tonight. Another cold front approaches
tonight and moves across the waters Sun afternoon. A period of pre-
frontal SW gales is possible tonight into Sun morning with continued
gusty W-NW winds late Sun into Sun night. High pres builds S of the
waters late Mon into Mon night, then a warm front moves into the
waters Tue. Low pres develops on the front east of New Eng Tue night
and moves offshore, then high pres builds in from the west Wed.
$$
ANZ250-211900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 25 to 30 kt with gusts up to 40 kt.
Seas 5 to 8 ft. Wave Detail: SW 7 ft at 6 seconds and SE 4 ft at
10 seconds.
.SUN...SW winds 20 to 25 kt with gusts up to 40 kt, becoming W
with gusts up to 30 kt in the afternoon. Seas 5 to 8 ft. Wave
Detail: SW 7 ft at 6 seconds and SE 4 ft at 10 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas
5 to 8 ft. Wave Detail: NW 7 ft at 6 seconds and SE 3 ft at
10 seconds.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 35 kt. Seas 5 to 8 ft, subsiding to 4 to
6 ft in the afternoon. Wave Detail: NW 7 ft at 6 seconds and E
2 ft at 10 seconds, becoming NW 6 ft at 6 seconds and E 2 ft at
10 seconds.
.MON NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 5 ft. Wave Detail: W 4 ft at 5 seconds and E 2 ft at
10 seconds.
.TUE...SW winds around 10 kt, becoming S with gusts up to 20 kt
in the afternoon. Seas 2 to 4 ft. Wave Detail: S 3 ft at
4 seconds and NE 2 ft at 7 seconds. Snow likely. A chance of rain
in the morning, then rain likely in the afternoon. Vsby 1 to
3 NM.
.TUE NIGHT...S winds 15 to 20 kt, becoming NW 20 to 25 kt after
midnight. Gusts up to 30 kt. Seas 3 to 4 ft, building to 4 to
6 ft after midnight. Rain likely, mainly in the evening with vsby
1 to 3 NM.
.WED...N winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to
9 ft. A chance of rain.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
6 to 9 ft.
.THU...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. A chance of rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ251-211900-
Massachusetts Bay and Ipswich Bay-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 40 kt.
Seas 3 to 5 ft. Wave Detail: S 5 ft at 5 seconds and E 2 ft at
10 seconds.
.SUN...SW winds 20 to 25 kt, becoming W in the afternoon. Gusts
up to 35 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 5 seconds
and E 2 ft at 10 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas
3 to 5 ft. Wave Detail: NW 5 ft at 4 seconds and E 2 ft at
10 seconds.
.MON...NW winds 20 to 25 kt with gusts up to 35 kt, diminishing
to around 15 kt with gusts up to 25 kt in the afternoon. Seas
3 to 5 ft. Wave Detail: NW 5 ft at 5 seconds and E 2 ft at
10 seconds.
.MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: NW 3 ft at 4 seconds and NE 2 ft at 8 seconds.
.TUE...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and
NE 1 foot at 8 seconds. Snow likely. Rain likely in the
afternoon. Vsby 1 NM or less.
.TUE NIGHT...S winds 15 to 20 kt, becoming NW 20 to 25 kt after
midnight. Seas 2 to 3 ft. Rain likely, mainly in the evening with
vsby 1 to 3 NM.
.WED AND WED NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt,
becoming W 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ231-211900-
Cape Cod Bay-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 35 kt.
Seas 3 to 4 ft. Wave Detail: SW 4 ft at 4 seconds and E 1 foot at
8 seconds.
.SUN...SW winds 20 to 25 kt, becoming W 15 to 20 kt in the
afternoon. Gusts up to 35 kt. Seas 3 to 4 ft. Wave Detail: SW
4 ft at 4 seconds and SE 2 ft at 9 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas
3 to 5 ft. Wave Detail: NW 5 ft at 5 seconds and SE 2 ft at
10 seconds.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 35 kt. Seas 3 to 5 ft. Wave Detail: NW
5 ft at 6 seconds and E 1 foot at 10 seconds.
.MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 6 seconds and NE
1 foot at 9 seconds.
.TUE...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: W 2 ft
at 5 seconds and NE 1 foot at 7 seconds. Snow likely with a
chance of rain in the morning, then rain in the afternoon. Vsby
1 to 3 NM.
.TUE NIGHT...S winds 10 to 15 kt, becoming NW 20 to 25 kt after
midnight. Seas 2 to 4 ft. Rain likely, mainly in the evening.
.WED...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft.
.WED NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft.
.THU...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.
.THU NIGHT...W winds around 10 kt. Seas 2 to 3 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ254-211900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 40 kt.
Seas 5 to 8 ft. Wave Detail: S 8 ft at 7 seconds and S 4 ft at
10 seconds.
.SUN...SW winds 20 to 25 kt with gusts up to 40 kt, becoming W
with gusts up to 30 kt in the afternoon. Seas 5 to 8 ft. Wave
Detail: SW 8 ft at 7 seconds and SE 4 ft at 9 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas
5 to 8 ft. Wave Detail: NW 7 ft at 6 seconds and SE 4 ft at
10 seconds.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 35 kt. Seas 5 to 8 ft. Wave Detail: NW
8 ft at 7 seconds and E 2 ft at 10 seconds.
.MON NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail:
NW 5 ft at 6 seconds and E 2 ft at 9 seconds.
.TUE...W winds around 10 kt, becoming S with gusts up to 20 kt in
the afternoon. Seas 2 to 3 ft, building to 3 to 5 ft in the
afternoon. Wave Detail: W 3 ft at 5 seconds and NE 2 ft at
8 seconds, becoming S 4 ft at 5 seconds and NE 2 ft at 7 seconds.
Rain. A chance of snow in the morning. Vsby 1 to 3 NM.
.TUE NIGHT...S winds 15 to 20 kt, becoming NW 20 to 25 kt with
gusts up to 30 kt after midnight. Seas 5 to 7 ft. S and E of
Nantucket, seas 6 to 9 ft, building to 8 to 11 ft after midnight.
Rain likely, mainly in the evening.
.WED...N winds 25 to 30 kt. Seas 6 to 9 ft. A chance of rain.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
6 to 9 ft.
.THU...W winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to
7 ft.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft. A chance of rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ255-211900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 25 to 30 kt with gusts up to 35 kt.
Seas 8 to 11 ft. Wave Detail: SW 11 ft at 8 seconds and SE 4 ft
at 9 seconds.
.SUN...SW winds 25 to 30 kt, becoming W 20 to 25 kt in the
afternoon. Gusts up to 40 kt. Seas 8 to 11 ft. Wave Detail: SW
11 ft at 8 seconds and SE 2 ft at 9 seconds.
.SUN NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
6 to 9 ft. Wave Detail: W 9 ft at 8 seconds and SE 2 ft at
10 seconds.
.MON...NW winds 20 to 25 kt. Gusts up to 35 kt, decreasing to
25 kt in the afternoon. Seas 5 to 8 ft, subsiding to 4 to 6 ft in
the afternoon. Wave Detail: NW 8 ft at 7 seconds and E 2 ft at
10 seconds, becoming W 6 ft at 7 seconds and E 2 ft at
10 seconds.
.MON NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft. Wave Detail: W 5 ft at 6 seconds and E 1 foot at
9 seconds.
.TUE...SW winds 10 to 15 kt, becoming S 15 to 20 kt in the
afternoon. Seas 2 to 4 ft, building to 4 to 6 ft in the
afternoon. Wave Detail: SW 4 ft at 5 seconds and E 1 foot at
10 seconds, becoming SW 6 ft at 7 seconds and E 1 foot at
10 seconds. A chance of rain in the morning, then rain in the
afternoon. Vsby 1 to 3 NM.
.TUE NIGHT...SW winds 20 to 25 kt, becoming NW 25 to 30 kt with
gusts up to 35 kt after midnight. Seas 6 to 9 ft, building to
8 to 11 ft after midnight. Rain likely, mainly in the evening.
.WED...NW winds 25 to 35 kt with gusts up to 40 kt. Seas 6 to
9 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 ft.
.THU...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 4 to 6 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ256-211900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 25 to 30 kt with gusts up to 40 kt.
Seas 8 to 11 ft. Wave Detail: SW 11 ft at 7 seconds and SE 4 ft
at 10 seconds.
.SUN...SW winds 25 to 30 kt, becoming W 20 to 25 kt in the
afternoon. Gusts up to 40 kt. Seas 8 to 11 ft, subsiding to 7 to
9 ft in the afternoon. Wave Detail: SW 11 ft at 8 seconds and SE
3 ft at 10 seconds, becoming W 9 ft at 8 seconds and SE 2 ft at
10 seconds.
.SUN NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
6 to 8 ft. Wave Detail: NW 8 ft at 6 seconds and SE 2 ft at
10 seconds.
.MON...NW winds 20 to 25 kt, becoming W 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 5 to 7 ft, subsiding to 3 to
5 ft in the afternoon. Wave Detail: NW 7 ft at 6 seconds and SE
2 ft at 10 seconds, becoming NW 5 ft at 5 seconds and SE 2 ft at
10 seconds.
.MON NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 4 ft. Wave Detail: W 4 ft at 5 seconds and SE 1 foot at
9 seconds. A chance of rain and snow after midnight.
.TUE...SW winds 10 to 15 kt, becoming S 15 to 20 kt in the
afternoon. Seas 2 to 4 ft, building to 5 to 7 ft in the
afternoon. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot at
10 seconds, becoming SW 7 ft at 7 seconds and SE 1 foot at
10 seconds. Rain. A chance of snow in the morning with vsby 1 to
3 NM.
.TUE NIGHT...W winds 20 to 25 kt, becoming NW 25 to 30 kt with
gusts up to 35 kt after midnight. Seas 6 to 9 ft. Rain likely in
the evening.
.WED...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 5 to
8 ft.
.WED NIGHT AND THU...NW winds 15 to 20 kt, becoming W 10 to
15 kt. Seas 3 to 5 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 4 to 5 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ232-211900-
Nantucket Sound-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 30 kt.
Seas 4 to 6 ft. Wave Detail: SW 5 ft at 5 seconds and SE 2 ft at
10 seconds.
.SUN...SW winds 20 to 25 kt, becoming W in the afternoon. Gusts
up to 30 kt. Seas 4 to 6 ft. Wave Detail: SW 5 ft at 5 seconds
and SE 2 ft at 10 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas
3 to 5 ft. Wave Detail: W 5 ft at 5 seconds and SE 1 foot at
10 seconds.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: NW
4 ft at 4 seconds and E 1 foot at 10 seconds.
.MON NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds
and E 1 foot at 10 seconds.
.TUE...SW winds 10 to 15 kt, becoming S with gusts up to 20 kt in
the afternoon. Seas 2 to 4 ft. Wave Detail: S 4 ft at 4 seconds
and E 1 foot at 10 seconds. Rain. A chance of snow in the
morning. Vsby 1 to 3 NM.
.TUE NIGHT...SW winds 15 to 20 kt, becoming NW 20 to 25 kt with
gusts up to 30 kt after midnight. Seas 4 to 6 ft. Rain likely,
mainly in the evening.
.WED...NW winds 25 to 30 kt. Seas 4 to 6 ft.
.WED NIGHT AND THU...NW winds 15 to 20 kt, becoming W 10 to
15 kt. Seas 2 to 4 ft.
.THU NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ233-211900-
Vineyard Sound-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 25 to 30 kt with gusts up to 35 kt.
Seas 5 to 8 ft. Wave Detail: SW 8 ft at 7 seconds and SE 2 ft at
10 seconds.
.SUN...SW winds 25 to 30 kt, becoming W 20 to 25 kt in the
afternoon. Seas 5 to 8 ft. Wave Detail: SW 8 ft at 7 seconds and
S 4 ft at 10 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas
3 to 5 ft. Wave Detail: W 5 ft at 7 seconds and SE 1 foot at
10 seconds.
.MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft. Wave Detail: NW 4 ft at 6 seconds and E 1 foot at
10 seconds.
.MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and E
1 foot at 9 seconds. A chance of.
.TUE...SW winds 10 to 15 kt, becoming S 15 to 20 kt in the
afternoon. Seas 2 to 3 ft, building to 3 to 5 ft in the
afternoon. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at
10 seconds, becoming SW 5 ft at 6 seconds and E 1 foot at
10 seconds. Rain. A chance of snow in the morning. Vsby 1 to
3 NM.
.TUE NIGHT...SW winds 15 to 20 kt, becoming NW 20 to 25 kt after
midnight. Seas 4 to 6 ft. Rain likely, mainly in the evening.
.WED...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft.
.WED NIGHT AND THU...NW winds 10 to 15 kt, becoming W. Gusts up
to 20 kt. Seas 2 to 3 ft.
.THU NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ234-211900-
Buzzards Bay-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 25 to 30 kt with gusts up to 35 kt.
Seas 4 to 6 ft. Wave Detail: SW 6 ft at 6 seconds and SE 1 foot
at 10 seconds.
.SUN...SW winds 25 to 30 kt, becoming W 15 to 20 kt in the
afternoon. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 7 seconds and
S 3 ft at 9 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas
3 to 4 ft. Wave Detail: W 4 ft at 6 seconds and SE 1 foot at
10 seconds.
.MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
3 ft. Wave Detail: NW 3 ft at 5 seconds and SE 1 foot at
10 seconds.
.MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave
Detail: W 2 ft at 5 seconds and E 1 foot at 9 seconds. A chance
of.
.TUE...SW winds 10 to 15 kt, becoming S with gusts up to 20 kt in
the afternoon. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds
and E 1 foot at 9 seconds. Rain. A chance of snow in the morning.
Vsby 1 to 3 NM.
.TUE NIGHT...SW winds 15 to 20 kt, becoming NW 20 to 25 kt after
midnight. Seas 2 to 4 ft. Rain likely, mainly in the evening.
.WED...NW winds 20 to 25 kt. Seas 2 to 4 ft.
.WED NIGHT AND THU...NW winds 10 to 15 kt, becoming W with gusts
up to 20 kt. Seas around 2 ft.
.THU NIGHT...W winds around 10 kt. Seas around 2 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ235-211900-
Rhode Island Sound-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 25 to 30 kt with gusts up to 40 kt.
Seas 6 to 9 ft. Wave Detail: SW 9 ft at 7 seconds and SE 3 ft at
10 seconds.
.SUN...SW winds 25 to 30 kt with gusts up to 40 kt, becoming W
20 to 25 kt with gusts up to 30 kt in the afternoon. Seas 6 to
9 ft, subsiding to 5 to 7 ft in the afternoon. Wave Detail: SW
9 ft at 8 seconds and S 5 ft at 9 seconds, becoming W 7 ft at
7 seconds and SE 3 ft at 10 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas
4 to 6 ft. Wave Detail: W 6 ft at 6 seconds and SE 2 ft at
10 seconds.
.MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to
5 ft. Wave Detail: NW 5 ft at 5 seconds and SE 1 foot at
10 seconds.
.MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE
1 foot at 9 seconds. A chance of snow after midnight.
.TUE...SW winds 10 to 15 kt, becoming S 15 to 20 kt in the
afternoon. Seas 2 to 3 ft, building to 4 to 6 ft in the
afternoon. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at
10 seconds, becoming SW 6 ft at 6 seconds and SE 1 foot at
10 seconds. Rain. A chance of snow in the morning with vsby 1 to
3 NM.
.TUE NIGHT...W winds 15 to 20 kt, becoming NW 20 to 25 kt with
gusts up to 30 kt after midnight. Seas 5 to 7 ft. Rain likely in
the evening.
.WED...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft.
.WED NIGHT AND THU...NW winds 10 to 15 kt, becoming W. Gusts up
to 20 kt. Seas 2 to 3 ft.
.THU NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ237-211900-
Block Island Sound-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 40 kt.
Seas 5 to 8 ft. Wave Detail: SW 7 ft at 6 seconds and S 3 ft at
10 seconds.
.SUN...W winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to
8 ft. Wave Detail: W 7 ft at 6 seconds and S 5 ft at 9 seconds.
.SUN NIGHT...NW winds around 20 kt with gusts up to 35 kt. Seas
4 to 6 ft. Wave Detail: W 5 ft at 6 seconds and SE 3 ft at
10 seconds.
.MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft. Wave Detail: NW 4 ft at 5 seconds and SE 2 ft at
10 seconds.
.MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE
1 foot at 10 seconds. A chance of snow after midnight.
.TUE...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft, building to 3 to 5 ft in the afternoon. Wave
Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds, becoming
SW 4 ft at 6 seconds and SE 1 foot at 10 seconds. Rain. A chance
of snow in the morning with vsby 1 to 3 NM.
.TUE NIGHT...W winds 15 to 20 kt, becoming NW 20 to 25 kt with
gusts up to 30 kt after midnight. Seas 4 to 6 ft. Rain likely in
the evening.
.WED...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft.
.WED NIGHT AND THU...NW winds 10 to 15 kt, becoming W with gusts
up to 20 kt. Seas 2 to 3 ft.
.THU NIGHT...W winds around 10 kt. Seas 2 to 3 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ230-211900-
Boston Harbor-
104 AM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 35 kt.
Waves around 2 ft.
.SUN...SW winds 15 to 20 kt, becoming W in the afternoon. Gusts
up to 30 kt. Waves around 2 ft.
.SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Waves
around 2 ft.
.MON...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Gusts up to 30 kt. Waves around 2 ft.
.MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Waves around 2 ft in
the evening, then 1 foot or less. A chance of.
.TUE...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Waves 1 foot or less, then around 2 ft in the
afternoon. Snow likely. Rain in the afternoon. Vsby 1 NM or less.
.TUE NIGHT...SW winds 10 to 15 kt, becoming NW 15 to 20 kt with
gusts up to 25 kt after midnight. Waves around 2 ft. A chance of
rain. Vsby 1 to 3 NM in the evening.
.WED THROUGH THU...SW winds 20 to 25 kt. Waves around 2 ft.
.THU NIGHT...SW winds around 10 kt. Waves 1 foot or less. A
chance of rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ236-211900-
Narragansett Bay-
104 AM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 35 kt.
Waves 4 to 6 ft.
.SUN...SW winds 20 to 25 kt, becoming NW 15 to 20 kt in the
afternoon. Gusts up to 35 kt. Waves 4 to 6 ft, subsiding to 3 ft
in the afternoon.
.SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Waves
2 to 3 ft.
.MON...NW winds 10 to 15 kt. Gusts up to 30 kt, decreasing to
20 kt in the afternoon. Waves 2 to 3 ft.
.MON NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Waves around 2 ft. A chance of snow after midnight.
.TUE...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Waves 2 to 3 ft. Rain. Snow likely in the morning.
Vsby 1 to 3 NM.
.TUE NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after
midnight. Gusts up to 25 kt. Waves 2 to 3 ft. Rain likely in the
evening with vsby 1 to 3 NM.
.WED THROUGH THU...SW winds 15 to 20 kt with gusts up to 25 kt.
Waves 2 to 3 ft.
.THU NIGHT...W winds 5 to 10 kt. Waves around 2 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
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CWFBOX
Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
104 AM EST Sun Dec 21 2025
Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM
ANZ200-211900-
104 AM EST Sun Dec 21 2025
.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres moves offshore tonight. Another cold front approaches
tonight and moves across the waters Sun afternoon. A period of pre-
frontal SW gales is possible tonight into Sun morning with continued
gusty W-NW winds late Sun into Sun night. High pres builds S of the
waters late Mon into Mon night, then a warm front moves into the
waters Tue. Low pres develops on the front east of New Eng Tue night
and moves offshore, then high pres builds in from the west Wed.
$$
ANZ250-211900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 25 to 30 kt with gusts up to 40 kt.
Seas 5 to 8 ft. Wave Detail: SW 7 ft at 6 seconds and SE 4 ft at
10 seconds.
.SUN...SW winds 20 to 25 kt with gusts up to 40 kt, becoming W
with gusts up to 30 kt in the afternoon. Seas 5 to 8 ft. Wave
Detail: SW 7 ft at 6 seconds and SE 4 ft at 10 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas
5 to 8 ft. Wave Detail: NW 7 ft at 6 seconds and SE 3 ft at
10 seconds.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 35 kt. Seas 5 to 8 ft, subsiding to 4 to
6 ft in the afternoon. Wave Detail: NW 7 ft at 6 seconds and E
2 ft at 10 seconds, becoming NW 6 ft at 6 seconds and E 2 ft at
10 seconds.
.MON NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas
3 to 5 ft. Wave Detail: W 4 ft at 5 seconds and E 2 ft at
10 seconds.
.TUE...SW winds around 10 kt, becoming S with gusts up to 20 kt
in the afternoon. Seas 2 to 4 ft. Wave Detail: S 3 ft at
4 seconds and NE 2 ft at 7 seconds. Snow likely. A chance of rain
in the morning, then rain likely in the afternoon. Vsby 1 to
3 NM.
.TUE NIGHT...S winds 15 to 20 kt, becoming NW 20 to 25 kt after
midnight. Gusts up to 30 kt. Seas 3 to 4 ft, building to 4 to
6 ft after midnight. Rain likely, mainly in the evening with vsby
1 to 3 NM.
.WED...N winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to
9 ft. A chance of rain.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
6 to 9 ft.
.THU...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
6 ft.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. A chance of rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ251-211900-
Massachusetts Bay and Ipswich Bay-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 40 kt.
Seas 3 to 5 ft. Wave Detail: S 5 ft at 5 seconds and E 2 ft at
10 seconds.
.SUN...SW winds 20 to 25 kt, becoming W in the afternoon. Gusts
up to 35 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 5 seconds
and E 2 ft at 10 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas
3 to 5 ft. Wave Detail: NW 5 ft at 4 seconds and E 2 ft at
10 seconds.
.MON...NW winds 20 to 25 kt with gusts up to 35 kt, diminishing
to around 15 kt with gusts up to 25 kt in the afternoon. Seas
3 to 5 ft. Wave Detail: NW 5 ft at 5 seconds and E 2 ft at
10 seconds.
.MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: NW 3 ft at 4 seconds and NE 2 ft at 8 seconds.
.TUE...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and
NE 1 foot at 8 seconds. Snow likely. Rain likely in the
afternoon. Vsby 1 NM or less.
.TUE NIGHT...S winds 15 to 20 kt, becoming NW 20 to 25 kt after
midnight. Seas 2 to 3 ft. Rain likely, mainly in the evening with
vsby 1 to 3 NM.
.WED AND WED NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt,
becoming W 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ231-211900-
Cape Cod Bay-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 35 kt.
Seas 3 to 4 ft. Wave Detail: SW 4 ft at 4 seconds and E 1 foot at
8 seconds.
.SUN...SW winds 20 to 25 kt, becoming W 15 to 20 kt in the
afternoon. Gusts up to 35 kt. Seas 3 to 4 ft. Wave Detail: SW
4 ft at 4 seconds and SE 2 ft at 9 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas
3 to 5 ft. Wave Detail: NW 5 ft at 5 seconds and SE 2 ft at
10 seconds.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 35 kt. Seas 3 to 5 ft. Wave Detail: NW
5 ft at 6 seconds and E 1 foot at 10 seconds.
.MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 6 seconds and NE
1 foot at 9 seconds.
.TUE...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: W 2 ft
at 5 seconds and NE 1 foot at 7 seconds. Snow likely with a
chance of rain in the morning, then rain in the afternoon. Vsby
1 to 3 NM.
.TUE NIGHT...S winds 10 to 15 kt, becoming NW 20 to 25 kt after
midnight. Seas 2 to 4 ft. Rain likely, mainly in the evening.
.WED...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft.
.WED NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft.
.THU...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft.
.THU NIGHT...W winds around 10 kt. Seas 2 to 3 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ254-211900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 40 kt.
Seas 5 to 8 ft. Wave Detail: S 8 ft at 7 seconds and S 4 ft at
10 seconds.
.SUN...SW winds 20 to 25 kt with gusts up to 40 kt, becoming W
with gusts up to 30 kt in the afternoon. Seas 5 to 8 ft. Wave
Detail: SW 8 ft at 7 seconds and SE 4 ft at 9 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas
5 to 8 ft. Wave Detail: NW 7 ft at 6 seconds and SE 4 ft at
10 seconds.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 35 kt. Seas 5 to 8 ft. Wave Detail: NW
8 ft at 7 seconds and E 2 ft at 10 seconds.
.MON NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail:
NW 5 ft at 6 seconds and E 2 ft at 9 seconds.
.TUE...W winds around 10 kt, becoming S with gusts up to 20 kt in
the afternoon. Seas 2 to 3 ft, building to 3 to 5 ft in the
afternoon. Wave Detail: W 3 ft at 5 seconds and NE 2 ft at
8 seconds, becoming S 4 ft at 5 seconds and NE 2 ft at 7 seconds.
Rain. A chance of snow in the morning. Vsby 1 to 3 NM.
.TUE NIGHT...S winds 15 to 20 kt, becoming NW 20 to 25 kt with
gusts up to 30 kt after midnight. Seas 5 to 7 ft. S and E of
Nantucket, seas 6 to 9 ft, building to 8 to 11 ft after midnight.
Rain likely, mainly in the evening.
.WED...N winds 25 to 30 kt. Seas 6 to 9 ft. A chance of rain.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
6 to 9 ft.
.THU...W winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to
7 ft.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 5 ft. A chance of rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ255-211900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 25 to 30 kt with gusts up to 35 kt.
Seas 8 to 11 ft. Wave Detail: SW 11 ft at 8 seconds and SE 4 ft
at 9 seconds.
.SUN...SW winds 25 to 30 kt, becoming W 20 to 25 kt in the
afternoon. Gusts up to 40 kt. Seas 8 to 11 ft. Wave Detail: SW
11 ft at 8 seconds and SE 2 ft at 9 seconds.
.SUN NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
6 to 9 ft. Wave Detail: W 9 ft at 8 seconds and SE 2 ft at
10 seconds.
.MON...NW winds 20 to 25 kt. Gusts up to 35 kt, decreasing to
25 kt in the afternoon. Seas 5 to 8 ft, subsiding to 4 to 6 ft in
the afternoon. Wave Detail: NW 8 ft at 7 seconds and E 2 ft at
10 seconds, becoming W 6 ft at 7 seconds and E 2 ft at
10 seconds.
.MON NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft. Wave Detail: W 5 ft at 6 seconds and E 1 foot at
9 seconds.
.TUE...SW winds 10 to 15 kt, becoming S 15 to 20 kt in the
afternoon. Seas 2 to 4 ft, building to 4 to 6 ft in the
afternoon. Wave Detail: SW 4 ft at 5 seconds and E 1 foot at
10 seconds, becoming SW 6 ft at 7 seconds and E 1 foot at
10 seconds. A chance of rain in the morning, then rain in the
afternoon. Vsby 1 to 3 NM.
.TUE NIGHT...SW winds 20 to 25 kt, becoming NW 25 to 30 kt with
gusts up to 35 kt after midnight. Seas 6 to 9 ft, building to
8 to 11 ft after midnight. Rain likely, mainly in the evening.
.WED...NW winds 25 to 35 kt with gusts up to 40 kt. Seas 6 to
9 ft.
.WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 ft.
.THU...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 4 to 6 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ256-211900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 25 to 30 kt with gusts up to 40 kt.
Seas 8 to 11 ft. Wave Detail: SW 11 ft at 7 seconds and SE 4 ft
at 10 seconds.
.SUN...SW winds 25 to 30 kt, becoming W 20 to 25 kt in the
afternoon. Gusts up to 40 kt. Seas 8 to 11 ft, subsiding to 7 to
9 ft in the afternoon. Wave Detail: SW 11 ft at 8 seconds and SE
3 ft at 10 seconds, becoming W 9 ft at 8 seconds and SE 2 ft at
10 seconds.
.SUN NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
6 to 8 ft. Wave Detail: NW 8 ft at 6 seconds and SE 2 ft at
10 seconds.
.MON...NW winds 20 to 25 kt, becoming W 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 5 to 7 ft, subsiding to 3 to
5 ft in the afternoon. Wave Detail: NW 7 ft at 6 seconds and SE
2 ft at 10 seconds, becoming NW 5 ft at 5 seconds and SE 2 ft at
10 seconds.
.MON NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 4 ft. Wave Detail: W 4 ft at 5 seconds and SE 1 foot at
9 seconds. A chance of rain and snow after midnight.
.TUE...SW winds 10 to 15 kt, becoming S 15 to 20 kt in the
afternoon. Seas 2 to 4 ft, building to 5 to 7 ft in the
afternoon. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot at
10 seconds, becoming SW 7 ft at 7 seconds and SE 1 foot at
10 seconds. Rain. A chance of snow in the morning with vsby 1 to
3 NM.
.TUE NIGHT...W winds 20 to 25 kt, becoming NW 25 to 30 kt with
gusts up to 35 kt after midnight. Seas 6 to 9 ft. Rain likely in
the evening.
.WED...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 5 to
8 ft.
.WED NIGHT AND THU...NW winds 15 to 20 kt, becoming W 10 to
15 kt. Seas 3 to 5 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 4 to 5 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ232-211900-
Nantucket Sound-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 30 kt.
Seas 4 to 6 ft. Wave Detail: SW 5 ft at 5 seconds and SE 2 ft at
10 seconds.
.SUN...SW winds 20 to 25 kt, becoming W in the afternoon. Gusts
up to 30 kt. Seas 4 to 6 ft. Wave Detail: SW 5 ft at 5 seconds
and SE 2 ft at 10 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas
3 to 5 ft. Wave Detail: W 5 ft at 5 seconds and SE 1 foot at
10 seconds.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: NW
4 ft at 4 seconds and E 1 foot at 10 seconds.
.MON NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds
and E 1 foot at 10 seconds.
.TUE...SW winds 10 to 15 kt, becoming S with gusts up to 20 kt in
the afternoon. Seas 2 to 4 ft. Wave Detail: S 4 ft at 4 seconds
and E 1 foot at 10 seconds. Rain. A chance of snow in the
morning. Vsby 1 to 3 NM.
.TUE NIGHT...SW winds 15 to 20 kt, becoming NW 20 to 25 kt with
gusts up to 30 kt after midnight. Seas 4 to 6 ft. Rain likely,
mainly in the evening.
.WED...NW winds 25 to 30 kt. Seas 4 to 6 ft.
.WED NIGHT AND THU...NW winds 15 to 20 kt, becoming W 10 to
15 kt. Seas 2 to 4 ft.
.THU NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ233-211900-
Vineyard Sound-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 25 to 30 kt with gusts up to 35 kt.
Seas 5 to 8 ft. Wave Detail: SW 8 ft at 7 seconds and SE 2 ft at
10 seconds.
.SUN...SW winds 25 to 30 kt, becoming W 20 to 25 kt in the
afternoon. Seas 5 to 8 ft. Wave Detail: SW 8 ft at 7 seconds and
S 4 ft at 10 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas
3 to 5 ft. Wave Detail: W 5 ft at 7 seconds and SE 1 foot at
10 seconds.
.MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft. Wave Detail: NW 4 ft at 6 seconds and E 1 foot at
10 seconds.
.MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and E
1 foot at 9 seconds. A chance of.
.TUE...SW winds 10 to 15 kt, becoming S 15 to 20 kt in the
afternoon. Seas 2 to 3 ft, building to 3 to 5 ft in the
afternoon. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at
10 seconds, becoming SW 5 ft at 6 seconds and E 1 foot at
10 seconds. Rain. A chance of snow in the morning. Vsby 1 to
3 NM.
.TUE NIGHT...SW winds 15 to 20 kt, becoming NW 20 to 25 kt after
midnight. Seas 4 to 6 ft. Rain likely, mainly in the evening.
.WED...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft.
.WED NIGHT AND THU...NW winds 10 to 15 kt, becoming W. Gusts up
to 20 kt. Seas 2 to 3 ft.
.THU NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ234-211900-
Buzzards Bay-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 25 to 30 kt with gusts up to 35 kt.
Seas 4 to 6 ft. Wave Detail: SW 6 ft at 6 seconds and SE 1 foot
at 10 seconds.
.SUN...SW winds 25 to 30 kt, becoming W 15 to 20 kt in the
afternoon. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 7 seconds and
S 3 ft at 9 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas
3 to 4 ft. Wave Detail: W 4 ft at 6 seconds and SE 1 foot at
10 seconds.
.MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
3 ft. Wave Detail: NW 3 ft at 5 seconds and SE 1 foot at
10 seconds.
.MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave
Detail: W 2 ft at 5 seconds and E 1 foot at 9 seconds. A chance
of.
.TUE...SW winds 10 to 15 kt, becoming S with gusts up to 20 kt in
the afternoon. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds
and E 1 foot at 9 seconds. Rain. A chance of snow in the morning.
Vsby 1 to 3 NM.
.TUE NIGHT...SW winds 15 to 20 kt, becoming NW 20 to 25 kt after
midnight. Seas 2 to 4 ft. Rain likely, mainly in the evening.
.WED...NW winds 20 to 25 kt. Seas 2 to 4 ft.
.WED NIGHT AND THU...NW winds 10 to 15 kt, becoming W with gusts
up to 20 kt. Seas around 2 ft.
.THU NIGHT...W winds around 10 kt. Seas around 2 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ235-211900-
Rhode Island Sound-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 25 to 30 kt with gusts up to 40 kt.
Seas 6 to 9 ft. Wave Detail: SW 9 ft at 7 seconds and SE 3 ft at
10 seconds.
.SUN...SW winds 25 to 30 kt with gusts up to 40 kt, becoming W
20 to 25 kt with gusts up to 30 kt in the afternoon. Seas 6 to
9 ft, subsiding to 5 to 7 ft in the afternoon. Wave Detail: SW
9 ft at 8 seconds and S 5 ft at 9 seconds, becoming W 7 ft at
7 seconds and SE 3 ft at 10 seconds.
.SUN NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas
4 to 6 ft. Wave Detail: W 6 ft at 6 seconds and SE 2 ft at
10 seconds.
.MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to
5 ft. Wave Detail: NW 5 ft at 5 seconds and SE 1 foot at
10 seconds.
.MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE
1 foot at 9 seconds. A chance of snow after midnight.
.TUE...SW winds 10 to 15 kt, becoming S 15 to 20 kt in the
afternoon. Seas 2 to 3 ft, building to 4 to 6 ft in the
afternoon. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at
10 seconds, becoming SW 6 ft at 6 seconds and SE 1 foot at
10 seconds. Rain. A chance of snow in the morning with vsby 1 to
3 NM.
.TUE NIGHT...W winds 15 to 20 kt, becoming NW 20 to 25 kt with
gusts up to 30 kt after midnight. Seas 5 to 7 ft. Rain likely in
the evening.
.WED...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft.
.WED NIGHT AND THU...NW winds 10 to 15 kt, becoming W. Gusts up
to 20 kt. Seas 2 to 3 ft.
.THU NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ237-211900-
Block Island Sound-
104 AM EST Sun Dec 21 2025
...GALE WARNING IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 40 kt.
Seas 5 to 8 ft. Wave Detail: SW 7 ft at 6 seconds and S 3 ft at
10 seconds.
.SUN...W winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to
8 ft. Wave Detail: W 7 ft at 6 seconds and S 5 ft at 9 seconds.
.SUN NIGHT...NW winds around 20 kt with gusts up to 35 kt. Seas
4 to 6 ft. Wave Detail: W 5 ft at 6 seconds and SE 3 ft at
10 seconds.
.MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft. Wave Detail: NW 4 ft at 5 seconds and SE 2 ft at
10 seconds.
.MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE
1 foot at 10 seconds. A chance of snow after midnight.
.TUE...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft, building to 3 to 5 ft in the afternoon. Wave
Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds, becoming
SW 4 ft at 6 seconds and SE 1 foot at 10 seconds. Rain. A chance
of snow in the morning with vsby 1 to 3 NM.
.TUE NIGHT...W winds 15 to 20 kt, becoming NW 20 to 25 kt with
gusts up to 30 kt after midnight. Seas 4 to 6 ft. Rain likely in
the evening.
.WED...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft.
.WED NIGHT AND THU...NW winds 10 to 15 kt, becoming W with gusts
up to 20 kt. Seas 2 to 3 ft.
.THU NIGHT...W winds around 10 kt. Seas 2 to 3 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ230-211900-
Boston Harbor-
104 AM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 35 kt.
Waves around 2 ft.
.SUN...SW winds 15 to 20 kt, becoming W in the afternoon. Gusts
up to 30 kt. Waves around 2 ft.
.SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Waves
around 2 ft.
.MON...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Gusts up to 30 kt. Waves around 2 ft.
.MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Waves around 2 ft in
the evening, then 1 foot or less. A chance of.
.TUE...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Waves 1 foot or less, then around 2 ft in the
afternoon. Snow likely. Rain in the afternoon. Vsby 1 NM or less.
.TUE NIGHT...SW winds 10 to 15 kt, becoming NW 15 to 20 kt with
gusts up to 25 kt after midnight. Waves around 2 ft. A chance of
rain. Vsby 1 to 3 NM in the evening.
.WED THROUGH THU...SW winds 20 to 25 kt. Waves around 2 ft.
.THU NIGHT...SW winds around 10 kt. Waves 1 foot or less. A
chance of rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ236-211900-
Narragansett Bay-
104 AM EST Sun Dec 21 2025
...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...
.REST OF TONIGHT...SW winds 20 to 25 kt with gusts up to 35 kt.
Waves 4 to 6 ft.
.SUN...SW winds 20 to 25 kt, becoming NW 15 to 20 kt in the
afternoon. Gusts up to 35 kt. Waves 4 to 6 ft, subsiding to 3 ft
in the afternoon.
.SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Waves
2 to 3 ft.
.MON...NW winds 10 to 15 kt. Gusts up to 30 kt, decreasing to
20 kt in the afternoon. Waves 2 to 3 ft.
.MON NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Waves around 2 ft. A chance of snow after midnight.
.TUE...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Waves 2 to 3 ft. Rain. Snow likely in the morning.
Vsby 1 to 3 NM.
.TUE NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after
midnight. Gusts up to 25 kt. Waves 2 to 3 ft. Rain likely in the
evening with vsby 1 to 3 NM.
.WED THROUGH THU...SW winds 15 to 20 kt with gusts up to 25 kt.
Waves 2 to 3 ft.
.THU NIGHT...W winds 5 to 10 kt. Waves around 2 ft. A chance of
rain.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
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