FZUS51 KBOX 150607
CWFBOX
Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
106 AM EST Mon Dec 15 2025
Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM
ANZ200-151900-
106 AM EST Mon Dec 15 2025
.Synopsis for Massachusetts and Rhode Island coastal waters...
An arctic cold front will cross the waters this evening. WNW gale
force wind gusts are the expected tonight into Monday. High pres
then builds S of the waters Tue and moves E by Wed. Strong low pres
tracking well to our N may bring Srly gale force wind gusts sometime
late Thu into early Fri ahead of our next cold front.
$$
ANZ250-151900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 25 to 30 kt. Seas 5 to 8 ft. Wave
Detail: N 8 ft at 7 seconds and SE 1 foot at 11 seconds.
.MON...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 5 to 8 ft. Wave Detail: N 7 ft at 7 seconds and
SE 2 ft at 11 seconds.
.MON NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 ft, subsiding to 3 to 4 ft after midnight. Wave Detail: W
5 ft at 5 seconds and NE 3 ft at 7 seconds, becoming W 4 ft at
5 seconds and NE 1 foot at 7 seconds.
.TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and NE 1 foot at
7 seconds.
.TUE NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt with
gusts up to 30 kt after midnight. Seas 2 to 3 ft, building to
3 to 5 ft after midnight. Wave Detail: W 3 ft at 3 seconds and SE
1 foot at 11 seconds, becoming SW 4 ft at 4 seconds and SE 1 foot
at 11 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft. Wave Detail: SW 5 ft at 5 seconds and SE 1 foot at
10 seconds.
.WED NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 3 to 5 ft.
.THU...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft.
.THU NIGHT AND FRI...S winds 25 to 30 kt, becoming SW. Gusts up
to 40 kt. Seas 4 to 6 ft. Rain likely.
.FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
5 to 8 ft.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ251-151900-
Massachusetts Bay and Ipswich Bay-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 25 to 30 kt. Seas 3 to 5 ft. Wave
Detail: N 5 ft at 6 seconds and SE 1 foot at 10 seconds.
.MON...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft. Wave Detail: NE 5 ft at 8 seconds and NW 4 ft at 4 seconds.
.MON NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds
and NE 3 ft at 7 seconds.
.TUE...W winds 10 to 15 kt, becoming SW 5 to 10 kt in the
afternoon. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and
N 1 foot at 6 seconds.
.TUE NIGHT AND WED...SW winds 20 to 25 kt with gusts up to 30 kt.
Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and N 1 foot at
4 seconds.
.WED NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds
and SE 1 foot at 10 seconds.
.THU...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
3 ft.
.THU NIGHT AND FRI...S winds 25 to 30 kt, becoming SW. Seas 3 to
4 ft. Rain likely.
.FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
4 to 6 ft.
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.
$$
ANZ231-151900-
Cape Cod Bay-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 25 to 30 kt. Seas 4 to 6 ft. Wave
Detail: NW 6 ft at 7 seconds and SE 1 foot at 10 seconds. Light
freezing spray.
.MON...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 4 to 6 ft. Wave Detail: NW 6 ft at 7 seconds and
N 5 ft at 8 seconds. Light freezing spray.
.MON NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 7 seconds
and SE 1 foot at 10 seconds.
.TUE...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft
at 6 seconds and NE 1 foot at 7 seconds.
.TUE NIGHT AND WED...SW winds 15 to 20 kt with gusts up to 30 kt.
Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and N 1 foot at
5 seconds.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: SW 2 ft at 4 seconds and SE 1 foot at 10 seconds.
.THU...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft.
.THU NIGHT AND FRI...S winds 25 to 30 kt, becoming SW. Gusts up
to 40 kt. Seas 4 to 6 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 25 to 30 kt. Seas 4 to 6 ft.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ254-151900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 25 to 30 kt with gusts up to 35 kt.
Seas 6 to 9 ft. Wave Detail: NW 8 ft at 7 seconds and N 7 ft at
8 seconds. Light freezing spray. A chance of snow showers. Vsby
1 to 3 NM.
.MON...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 6 to 9 ft. Wave Detail: W 7 ft at 7 seconds and N
7 ft at 8 seconds. Light freezing spray in the morning.
.MON NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
5 to 7 ft, subsiding to 3 to 5 ft after midnight. Wave Detail: W
6 ft at 6 seconds and N 5 ft at 8 seconds, becoming W 4 ft at
6 seconds and NE 3 ft at 8 seconds.
.TUE...W winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft
at 6 seconds and NE 2 ft at 7 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. Gusts up to 25 kt. Seas 2 to 3 ft, building to
3 to 5 ft after midnight. Wave Detail: N 2 ft at 5 seconds and SW
2 ft at 5 seconds, becoming SW 4 ft at 5 seconds and N 1 foot at
4 seconds.
.WED AND WED NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Seas 4 to 6 ft. Wave Detail: SW 5 ft at 6 seconds and S 2 ft at
10 seconds.
.THU...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft.
.THU NIGHT...S winds 25 to 30 kt with gusts up to 40 kt. Seas
5 to 7 ft. Rain likely.
.FRI...SW winds 25 to 30 kt with gusts up to 40 kt. Seas 6 to
9 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
7 to 10 ft.
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.
$$
ANZ255-151900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 30 to 35 kt. Seas 6 to 9 ft. Wave
Detail: W 9 ft at 7 seconds and N 3 ft at 6 seconds. Light
freezing spray. A chance of snow showers. Vsby 1 to 3 NM.
.MON...NW winds 25 to 30 kt with gusts up to 35 kt, diminishing
to 20 to 25 kt in the afternoon. Seas 6 to 9 ft. Wave Detail: W
8 ft at 7 seconds and NE 3 ft at 8 seconds. Light freezing spray.
.MON NIGHT...W winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. Seas 5 to 7 ft. Wave Detail: W 6 ft at 6 seconds
and NE 2 ft at 9 seconds.
.TUE...W winds 15 to 20 kt, diminishing to around 10 kt in the
afternoon. Seas 4 to 6 ft, subsiding to 2 to 4 ft in the
afternoon. Wave Detail: W 4 ft at 7 seconds and NW 1 foot at
4 seconds, becoming SW 4 ft at 7 seconds and NW 1 foot at
4 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 3 ft, building to 4 to 6 ft after
midnight. Wave Detail: SW 3 ft at 6 seconds and W 1 foot at
3 seconds, becoming W 6 ft at 5 seconds and SE 1 foot at
10 seconds.
.WED AND WED NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Seas 5 to 8 ft. Wave Detail: SW 8 ft at 7 seconds and W 1 foot at
4 seconds.
.THU...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft.
.THU NIGHT...S winds 30 to 40 kt with gusts up to 45 kt. Seas
6 to 9 ft. Rain likely.
.FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 8 to
11 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 30 to 40 kt with gusts up to 45 kt. Seas
8 to 11 ft.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ256-151900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 25 to 30 kt with gusts up to 35 kt.
Seas 6 to 8 ft. Wave Detail: W 8 ft at 7 seconds and S 3 ft at
10 seconds.
.MON...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 5 to 8 ft. Wave Detail: W 7 ft at 7 seconds and S
3 ft at 10 seconds.
.MON NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and NE 1 foot at
8 seconds. A chance of snow after midnight.
.TUE...W winds 15 to 20 kt, diminishing to around 10 kt in the
afternoon. Seas 3 to 5 ft. Wave Detail: W 4 ft at 5 seconds and
SE 1 foot at 11 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 3 ft, building to 4 to 6 ft after
midnight. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at
11 seconds, becoming W 6 ft at 5 seconds and SE 1 foot at
10 seconds.
.WED AND WED NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Seas 5 to 8 ft. Wave Detail: SW 8 ft at 7 seconds and W 1 foot at
4 seconds.
.THU...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft.
.THU NIGHT...S winds 30 to 40 kt with gusts up to 45 kt. Seas
6 to 9 ft. Rain likely.
.FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 8 to
11 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 30 to 40 kt with gusts up to 45 kt. Seas
8 to 11 ft.
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.
$$
ANZ232-151900-
Nantucket Sound-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
...FREEZING SPRAY ADVISORY IN EFFECT UNTIL 10 AM EST THIS
MORNING...
.REST OF TONIGHT...NW winds 25 to 30 kt with gusts up to 35 kt.
Seas 3 to 5 ft. Wave Detail: N 5 ft at 5 seconds and W 1 foot at
7 seconds. Light freezing spray. A chance of snow showers.
.MON...NW winds 25 to 30 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 3 to 5 ft. Wave Detail: NW 5 ft at 4 seconds and
NE 3 ft at 8 seconds. Light freezing spray.
.MON NIGHT...W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W
3 ft at 4 seconds and SW 2 ft at 7 seconds.
.TUE...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft
at 3 seconds and SW 1 foot at 7 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds
and N 1 foot at 6 seconds.
.WED AND WED NIGHT...NW winds 20 to 25 kt. Seas 3 to 5 ft. Wave
Detail: SW 4 ft at 5 seconds and SE 1 foot at 11 seconds.
.THU...S winds 15 to 20 kt. Seas 2 to 3 ft.
.THU NIGHT AND FRI...S winds 25 to 35 kt, becoming SW. Seas 4 to
6 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 30 to 35 kt. Seas 4 to 6 ft.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ233-151900-
Vineyard Sound-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
...FREEZING SPRAY ADVISORY IN EFFECT UNTIL 10 AM EST THIS
MORNING...
.REST OF TONIGHT...NW winds 25 to 30 kt. Seas 3 to 4 ft. Wave
Detail: N 4 ft at 5 seconds and S 2 ft at 10 seconds. Light
freezing spray.
.MON...NW winds 25 to 30 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and
NE 2 ft at 7 seconds. Light freezing spray.
.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 5 seconds
and NE 2 ft at 8 seconds.
.TUE...W winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and
NE 1 foot at 7 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 4 ft. Wave Detail: W 4 ft at 4 seconds
and SE 1 foot at 11 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft. Wave Detail: SW 6 ft at 7 seconds and W 1 foot at
4 seconds.
.WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, becoming
NW 5 to 10 kt after midnight. Seas 3 to 5 ft.
.THU...S winds 15 to 20 kt. Seas 2 to 4 ft.
.THU NIGHT...S winds 30 to 40 kt with gusts up to 45 kt. Seas
4 to 6 ft. Rain likely.
.FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 5 to
7 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 30 to 35 kt. Seas 4 to 6 ft.
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.
$$
ANZ234-151900-
Buzzards Bay-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
...FREEZING SPRAY ADVISORY IN EFFECT UNTIL 10 AM EST THIS
MORNING...
.REST OF TONIGHT...NW winds 25 to 30 kt. Seas around 3 ft. Wave
Detail: W 3 ft at 5 seconds and N 2 ft at 5 seconds. Light
freezing spray.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft
at 5 seconds and NE 3 ft at 7 seconds. Light freezing spray.
.MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and NE
2 ft at 7 seconds.
.TUE...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft
at 5 seconds and NE 1 foot at 7 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 4 ft. Wave Detail: W 4 ft at 4 seconds
and N 1 foot at 5 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft. Wave Detail: SW 5 ft at 5 seconds and SE 1 foot at
10 seconds.
.WED NIGHT...W winds 15 to 20 kt, diminishing to 5 to 10 kt after
midnight. Seas 2 to 4 ft.
.THU...S winds 15 to 20 kt. Seas 2 to 3 ft.
.THU NIGHT AND FRI...S winds 30 to 40 kt, becoming SW. Seas 4 to
6 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 25 to 30 kt. Seas 4 to 6 ft.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ235-151900-
Rhode Island Sound-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 25 to 30 kt. Seas 4 to 6 ft. Wave
Detail: W 5 ft at 6 seconds and S 3 ft at 10 seconds.
.MON...NW winds 25 to 30 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 4 to 6 ft. Wave Detail: W 5 ft at 6 seconds and S
3 ft at 10 seconds.
.MON NIGHT...W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W
3 ft at 5 seconds and NE 1 foot at 8 seconds.
.TUE...NW winds 10 to 15 kt, becoming W 5 to 10 kt in the
afternoon. Seas 2 to 4 ft. Wave Detail: W 3 ft at 6 seconds and
SE 1 foot at 11 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt
after midnight. Seas around 2 ft, building to 3 to 5 ft after
midnight. Wave Detail: SW 2 ft at 6 seconds and W 1 foot at
3 seconds, becoming SW 5 ft at 5 seconds and SE 1 foot at
11 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to
7 ft. Wave Detail: SW 7 ft at 6 seconds and SE 1 foot at
10 seconds.
.WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, becoming
NW 10 to 15 kt after midnight. Seas 4 to 6 ft.
.THU...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
5 ft.
.THU NIGHT...S winds 30 to 40 kt with gusts up to 45 kt. Seas
5 to 8 ft. Rain likely.
.FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 6 to
9 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
6 to 9 ft.
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.
$$
ANZ237-151900-
Block Island Sound-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds around 25 kt with gusts up to 30 kt.
Seas 3 to 5 ft. Wave Detail: N 4 ft at 5 seconds and S 2 ft at
9 seconds. Light freezing spray.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft
at 5 seconds and S 2 ft at 10 seconds. Light freezing spray in
the morning.
.MON NIGHT...W winds around 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and N 1 foot at
4 seconds.
.TUE...NW winds 10 to 15 kt, becoming W 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and
SW 1 foot at 7 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt with
gusts up to 25 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW
3 ft at 5 seconds and SE 1 foot at 11 seconds.
.WED AND WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt.
Seas 3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot
at 10 seconds.
.THU...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft.
.THU NIGHT AND FRI...S winds 30 to 35 kt, becoming SW 25 to
35 kt. Gusts up to 45 kt. Seas 5 to 8 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
5 to 8 ft.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ230-151900-
Boston Harbor-
106 AM EST Mon Dec 15 2025
...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...
.REST OF TONIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Waves around 2 ft.
.MON...NW winds 20 to 25 kt, becoming W 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Waves around 2 ft.
.MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Waves around 2 ft.
.TUE...W winds 5 to 10 kt. Waves 1 foot or less.
.TUE NIGHT THROUGH WED NIGHT...W winds 15 to 20 kt with gusts up
to 25 kt. Waves around 2 ft.
.THU...S winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft.
.THU NIGHT AND FRI...S winds 25 to 30 kt, becoming SW. Waves
around 2 ft. Rain likely.
.FRI NIGHT...NW winds 25 to 30 kt. Waves around 2 ft, except 3 to
5 ft at the outer harbor entrance.
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.
$$
ANZ236-151900-
Narragansett Bay-
106 AM EST Mon Dec 15 2025
...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...
.REST OF TONIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Waves around 3 ft.
.MON...NW winds 15 to 20 kt with gusts up to 30 kt, diminishing
to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves
2 to 3 ft.
.MON NIGHT...W winds 5 to 10 kt. Waves around 2 ft.
.TUE...W winds 5 to 10 kt, becoming SW in the afternoon. Waves
around 2 ft.
.TUE NIGHT AND WED...SW winds 15 to 20 kt with gusts up to 25 kt.
Waves 2 to 4 ft.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Waves 2 to 4 ft.
.THU...S winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft.
.THU NIGHT...S winds 30 to 35 kt with gusts up to 40 kt. Waves
3 to 5 ft. Rain likely.
.FRI...SW winds 25 to 35 kt with gusts up to 40 kt. Waves 4 to
6 ft. Rain likely.
.FRI NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Waves
2 to 3 ft, except 5 to 7 ft at the bay entrance.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
For the latest updates...please visit our webpage at
www.weather.gov/boston
You can follow us on Facebook at
www.facebook.com/NWSBoston
You can follow us on Twitter at
@NWSBoston
CWFBOX
Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
106 AM EST Mon Dec 15 2025
Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM
ANZ200-151900-
106 AM EST Mon Dec 15 2025
.Synopsis for Massachusetts and Rhode Island coastal waters...
An arctic cold front will cross the waters this evening. WNW gale
force wind gusts are the expected tonight into Monday. High pres
then builds S of the waters Tue and moves E by Wed. Strong low pres
tracking well to our N may bring Srly gale force wind gusts sometime
late Thu into early Fri ahead of our next cold front.
$$
ANZ250-151900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 25 to 30 kt. Seas 5 to 8 ft. Wave
Detail: N 8 ft at 7 seconds and SE 1 foot at 11 seconds.
.MON...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 5 to 8 ft. Wave Detail: N 7 ft at 7 seconds and
SE 2 ft at 11 seconds.
.MON NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 ft, subsiding to 3 to 4 ft after midnight. Wave Detail: W
5 ft at 5 seconds and NE 3 ft at 7 seconds, becoming W 4 ft at
5 seconds and NE 1 foot at 7 seconds.
.TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and NE 1 foot at
7 seconds.
.TUE NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt with
gusts up to 30 kt after midnight. Seas 2 to 3 ft, building to
3 to 5 ft after midnight. Wave Detail: W 3 ft at 3 seconds and SE
1 foot at 11 seconds, becoming SW 4 ft at 4 seconds and SE 1 foot
at 11 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft. Wave Detail: SW 5 ft at 5 seconds and SE 1 foot at
10 seconds.
.WED NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 3 to 5 ft.
.THU...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft.
.THU NIGHT AND FRI...S winds 25 to 30 kt, becoming SW. Gusts up
to 40 kt. Seas 4 to 6 ft. Rain likely.
.FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
5 to 8 ft.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ251-151900-
Massachusetts Bay and Ipswich Bay-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 25 to 30 kt. Seas 3 to 5 ft. Wave
Detail: N 5 ft at 6 seconds and SE 1 foot at 10 seconds.
.MON...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft. Wave Detail: NE 5 ft at 8 seconds and NW 4 ft at 4 seconds.
.MON NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds
and NE 3 ft at 7 seconds.
.TUE...W winds 10 to 15 kt, becoming SW 5 to 10 kt in the
afternoon. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and
N 1 foot at 6 seconds.
.TUE NIGHT AND WED...SW winds 20 to 25 kt with gusts up to 30 kt.
Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and N 1 foot at
4 seconds.
.WED NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds
and SE 1 foot at 10 seconds.
.THU...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
3 ft.
.THU NIGHT AND FRI...S winds 25 to 30 kt, becoming SW. Seas 3 to
4 ft. Rain likely.
.FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
4 to 6 ft.
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.
$$
ANZ231-151900-
Cape Cod Bay-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 25 to 30 kt. Seas 4 to 6 ft. Wave
Detail: NW 6 ft at 7 seconds and SE 1 foot at 10 seconds. Light
freezing spray.
.MON...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 4 to 6 ft. Wave Detail: NW 6 ft at 7 seconds and
N 5 ft at 8 seconds. Light freezing spray.
.MON NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 7 seconds
and SE 1 foot at 10 seconds.
.TUE...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft
at 6 seconds and NE 1 foot at 7 seconds.
.TUE NIGHT AND WED...SW winds 15 to 20 kt with gusts up to 30 kt.
Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and N 1 foot at
5 seconds.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: SW 2 ft at 4 seconds and SE 1 foot at 10 seconds.
.THU...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft.
.THU NIGHT AND FRI...S winds 25 to 30 kt, becoming SW. Gusts up
to 40 kt. Seas 4 to 6 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 25 to 30 kt. Seas 4 to 6 ft.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ254-151900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 25 to 30 kt with gusts up to 35 kt.
Seas 6 to 9 ft. Wave Detail: NW 8 ft at 7 seconds and N 7 ft at
8 seconds. Light freezing spray. A chance of snow showers. Vsby
1 to 3 NM.
.MON...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 6 to 9 ft. Wave Detail: W 7 ft at 7 seconds and N
7 ft at 8 seconds. Light freezing spray in the morning.
.MON NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
5 to 7 ft, subsiding to 3 to 5 ft after midnight. Wave Detail: W
6 ft at 6 seconds and N 5 ft at 8 seconds, becoming W 4 ft at
6 seconds and NE 3 ft at 8 seconds.
.TUE...W winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft
at 6 seconds and NE 2 ft at 7 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. Gusts up to 25 kt. Seas 2 to 3 ft, building to
3 to 5 ft after midnight. Wave Detail: N 2 ft at 5 seconds and SW
2 ft at 5 seconds, becoming SW 4 ft at 5 seconds and N 1 foot at
4 seconds.
.WED AND WED NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Seas 4 to 6 ft. Wave Detail: SW 5 ft at 6 seconds and S 2 ft at
10 seconds.
.THU...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft.
.THU NIGHT...S winds 25 to 30 kt with gusts up to 40 kt. Seas
5 to 7 ft. Rain likely.
.FRI...SW winds 25 to 30 kt with gusts up to 40 kt. Seas 6 to
9 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
7 to 10 ft.
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.
$$
ANZ255-151900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 30 to 35 kt. Seas 6 to 9 ft. Wave
Detail: W 9 ft at 7 seconds and N 3 ft at 6 seconds. Light
freezing spray. A chance of snow showers. Vsby 1 to 3 NM.
.MON...NW winds 25 to 30 kt with gusts up to 35 kt, diminishing
to 20 to 25 kt in the afternoon. Seas 6 to 9 ft. Wave Detail: W
8 ft at 7 seconds and NE 3 ft at 8 seconds. Light freezing spray.
.MON NIGHT...W winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. Seas 5 to 7 ft. Wave Detail: W 6 ft at 6 seconds
and NE 2 ft at 9 seconds.
.TUE...W winds 15 to 20 kt, diminishing to around 10 kt in the
afternoon. Seas 4 to 6 ft, subsiding to 2 to 4 ft in the
afternoon. Wave Detail: W 4 ft at 7 seconds and NW 1 foot at
4 seconds, becoming SW 4 ft at 7 seconds and NW 1 foot at
4 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 3 ft, building to 4 to 6 ft after
midnight. Wave Detail: SW 3 ft at 6 seconds and W 1 foot at
3 seconds, becoming W 6 ft at 5 seconds and SE 1 foot at
10 seconds.
.WED AND WED NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Seas 5 to 8 ft. Wave Detail: SW 8 ft at 7 seconds and W 1 foot at
4 seconds.
.THU...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft.
.THU NIGHT...S winds 30 to 40 kt with gusts up to 45 kt. Seas
6 to 9 ft. Rain likely.
.FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 8 to
11 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 30 to 40 kt with gusts up to 45 kt. Seas
8 to 11 ft.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ256-151900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 25 to 30 kt with gusts up to 35 kt.
Seas 6 to 8 ft. Wave Detail: W 8 ft at 7 seconds and S 3 ft at
10 seconds.
.MON...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 5 to 8 ft. Wave Detail: W 7 ft at 7 seconds and S
3 ft at 10 seconds.
.MON NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and NE 1 foot at
8 seconds. A chance of snow after midnight.
.TUE...W winds 15 to 20 kt, diminishing to around 10 kt in the
afternoon. Seas 3 to 5 ft. Wave Detail: W 4 ft at 5 seconds and
SE 1 foot at 11 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 3 ft, building to 4 to 6 ft after
midnight. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at
11 seconds, becoming W 6 ft at 5 seconds and SE 1 foot at
10 seconds.
.WED AND WED NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Seas 5 to 8 ft. Wave Detail: SW 8 ft at 7 seconds and W 1 foot at
4 seconds.
.THU...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft.
.THU NIGHT...S winds 30 to 40 kt with gusts up to 45 kt. Seas
6 to 9 ft. Rain likely.
.FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 8 to
11 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 30 to 40 kt with gusts up to 45 kt. Seas
8 to 11 ft.
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.
$$
ANZ232-151900-
Nantucket Sound-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
...FREEZING SPRAY ADVISORY IN EFFECT UNTIL 10 AM EST THIS
MORNING...
.REST OF TONIGHT...NW winds 25 to 30 kt with gusts up to 35 kt.
Seas 3 to 5 ft. Wave Detail: N 5 ft at 5 seconds and W 1 foot at
7 seconds. Light freezing spray. A chance of snow showers.
.MON...NW winds 25 to 30 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 3 to 5 ft. Wave Detail: NW 5 ft at 4 seconds and
NE 3 ft at 8 seconds. Light freezing spray.
.MON NIGHT...W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W
3 ft at 4 seconds and SW 2 ft at 7 seconds.
.TUE...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft
at 3 seconds and SW 1 foot at 7 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds
and N 1 foot at 6 seconds.
.WED AND WED NIGHT...NW winds 20 to 25 kt. Seas 3 to 5 ft. Wave
Detail: SW 4 ft at 5 seconds and SE 1 foot at 11 seconds.
.THU...S winds 15 to 20 kt. Seas 2 to 3 ft.
.THU NIGHT AND FRI...S winds 25 to 35 kt, becoming SW. Seas 4 to
6 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 30 to 35 kt. Seas 4 to 6 ft.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ233-151900-
Vineyard Sound-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
...FREEZING SPRAY ADVISORY IN EFFECT UNTIL 10 AM EST THIS
MORNING...
.REST OF TONIGHT...NW winds 25 to 30 kt. Seas 3 to 4 ft. Wave
Detail: N 4 ft at 5 seconds and S 2 ft at 10 seconds. Light
freezing spray.
.MON...NW winds 25 to 30 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and
NE 2 ft at 7 seconds. Light freezing spray.
.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 5 seconds
and NE 2 ft at 8 seconds.
.TUE...W winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and
NE 1 foot at 7 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 4 ft. Wave Detail: W 4 ft at 4 seconds
and SE 1 foot at 11 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft. Wave Detail: SW 6 ft at 7 seconds and W 1 foot at
4 seconds.
.WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, becoming
NW 5 to 10 kt after midnight. Seas 3 to 5 ft.
.THU...S winds 15 to 20 kt. Seas 2 to 4 ft.
.THU NIGHT...S winds 30 to 40 kt with gusts up to 45 kt. Seas
4 to 6 ft. Rain likely.
.FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 5 to
7 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 30 to 35 kt. Seas 4 to 6 ft.
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.
$$
ANZ234-151900-
Buzzards Bay-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
...FREEZING SPRAY ADVISORY IN EFFECT UNTIL 10 AM EST THIS
MORNING...
.REST OF TONIGHT...NW winds 25 to 30 kt. Seas around 3 ft. Wave
Detail: W 3 ft at 5 seconds and N 2 ft at 5 seconds. Light
freezing spray.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft
at 5 seconds and NE 3 ft at 7 seconds. Light freezing spray.
.MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and NE
2 ft at 7 seconds.
.TUE...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft
at 5 seconds and NE 1 foot at 7 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt
after midnight. Seas 2 to 4 ft. Wave Detail: W 4 ft at 4 seconds
and N 1 foot at 5 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft. Wave Detail: SW 5 ft at 5 seconds and SE 1 foot at
10 seconds.
.WED NIGHT...W winds 15 to 20 kt, diminishing to 5 to 10 kt after
midnight. Seas 2 to 4 ft.
.THU...S winds 15 to 20 kt. Seas 2 to 3 ft.
.THU NIGHT AND FRI...S winds 30 to 40 kt, becoming SW. Seas 4 to
6 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 25 to 30 kt. Seas 4 to 6 ft.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ235-151900-
Rhode Island Sound-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds 25 to 30 kt. Seas 4 to 6 ft. Wave
Detail: W 5 ft at 6 seconds and S 3 ft at 10 seconds.
.MON...NW winds 25 to 30 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 4 to 6 ft. Wave Detail: W 5 ft at 6 seconds and S
3 ft at 10 seconds.
.MON NIGHT...W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W
3 ft at 5 seconds and NE 1 foot at 8 seconds.
.TUE...NW winds 10 to 15 kt, becoming W 5 to 10 kt in the
afternoon. Seas 2 to 4 ft. Wave Detail: W 3 ft at 6 seconds and
SE 1 foot at 11 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt
after midnight. Seas around 2 ft, building to 3 to 5 ft after
midnight. Wave Detail: SW 2 ft at 6 seconds and W 1 foot at
3 seconds, becoming SW 5 ft at 5 seconds and SE 1 foot at
11 seconds.
.WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to
7 ft. Wave Detail: SW 7 ft at 6 seconds and SE 1 foot at
10 seconds.
.WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, becoming
NW 10 to 15 kt after midnight. Seas 4 to 6 ft.
.THU...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
5 ft.
.THU NIGHT...S winds 30 to 40 kt with gusts up to 45 kt. Seas
5 to 8 ft. Rain likely.
.FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 6 to
9 ft. Rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
6 to 9 ft.
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.
$$
ANZ237-151900-
Block Island Sound-
106 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...
.REST OF TONIGHT...NW winds around 25 kt with gusts up to 30 kt.
Seas 3 to 5 ft. Wave Detail: N 4 ft at 5 seconds and S 2 ft at
9 seconds. Light freezing spray.
.MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft
at 5 seconds and S 2 ft at 10 seconds. Light freezing spray in
the morning.
.MON NIGHT...W winds around 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and N 1 foot at
4 seconds.
.TUE...NW winds 10 to 15 kt, becoming W 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and
SW 1 foot at 7 seconds.
.TUE NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt with
gusts up to 25 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW
3 ft at 5 seconds and SE 1 foot at 11 seconds.
.WED AND WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt.
Seas 3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot
at 10 seconds.
.THU...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to
4 ft.
.THU NIGHT AND FRI...S winds 30 to 35 kt, becoming SW 25 to
35 kt. Gusts up to 45 kt. Seas 5 to 8 ft. Rain. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas
5 to 8 ft.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
ANZ230-151900-
Boston Harbor-
106 AM EST Mon Dec 15 2025
...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...
.REST OF TONIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Waves around 2 ft.
.MON...NW winds 20 to 25 kt, becoming W 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Waves around 2 ft.
.MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Waves around 2 ft.
.TUE...W winds 5 to 10 kt. Waves 1 foot or less.
.TUE NIGHT THROUGH WED NIGHT...W winds 15 to 20 kt with gusts up
to 25 kt. Waves around 2 ft.
.THU...S winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft.
.THU NIGHT AND FRI...S winds 25 to 30 kt, becoming SW. Waves
around 2 ft. Rain likely.
.FRI NIGHT...NW winds 25 to 30 kt. Waves around 2 ft, except 3 to
5 ft at the outer harbor entrance.
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.
$$
ANZ236-151900-
Narragansett Bay-
106 AM EST Mon Dec 15 2025
...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...
.REST OF TONIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Waves around 3 ft.
.MON...NW winds 15 to 20 kt with gusts up to 30 kt, diminishing
to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves
2 to 3 ft.
.MON NIGHT...W winds 5 to 10 kt. Waves around 2 ft.
.TUE...W winds 5 to 10 kt, becoming SW in the afternoon. Waves
around 2 ft.
.TUE NIGHT AND WED...SW winds 15 to 20 kt with gusts up to 25 kt.
Waves 2 to 4 ft.
.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Waves 2 to 4 ft.
.THU...S winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft.
.THU NIGHT...S winds 30 to 35 kt with gusts up to 40 kt. Waves
3 to 5 ft. Rain likely.
.FRI...SW winds 25 to 35 kt with gusts up to 40 kt. Waves 4 to
6 ft. Rain likely.
.FRI NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Waves
2 to 3 ft, except 5 to 7 ft at the bay entrance.
Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.
$$
For the latest updates...please visit our webpage at
www.weather.gov/boston
You can follow us on Facebook at
www.facebook.com/NWSBoston
You can follow us on Twitter at
@NWSBoston