FZUS52 KJAX 211220
CWFJAX
Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
820 AM EDT Tue Apr 21 2026
Atlantic Coastal Waters from Altamaha Sound GA to Flagler Beach
FL out to 60 nm.
Seas are provided as a range of the average height of the highest
1/3 of the waves, along with the occasional height of the average
highest 1/10 of the waves.
AMZ400-220330-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
820 AM EDT Tue Apr 21 2026
.SYNOPSIS...
Winds and waves subside gradually tonight with exercise caution over
the offshore Florida waters through late morning as high pressure
builds across the area waters today. Easterly winds Today will
return Wednesday as high pressure remains over the waters with
southerly winds overnight due to the land breeze. Winds will turn
more southeasterly Thursday into Friday during the daytime's
seabreeze circulation with southerly winds prevailing ahead of a
cold front Saturday and southwesterly on Sunday as the front begins
to stall just north of the waters. The front will bring increasing
chances for showers and thunderstorms over the waters this weekend.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Apr 20, 2026 at 0000 UTC...
54 nautical miles east of Flagler Beach.
62 nautical miles east of Saint Augustine Beach.
74 nautical miles east southeast of Jacksonville Beach.
80 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-454-220330-
Coastal waters from Altamaha Sound to Fernandina Beach FL out
20 NM-
Coastal waters from Fernandina Beach to St. Augustine FL out
20 NM-
Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-
820 AM EDT Tue Apr 21 2026
.REST OF TODAY...North winds 5 to 10 knots, becoming east this
afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail:
East 4 feet at 8 seconds. Intracoastal waters light chop.
.TONIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds.
Intracoastal waters light chop.
.WEDNESDAY...Northeast winds around 5 knots, becoming east in the
afternoon. Seas 2 to 3 feet. Wave Detail: East 3 feet at
8 seconds. Intracoastal waters light chop.
.WEDNESDAY NIGHT...South winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: East 3 feet at 8 seconds. Intracoastal waters light
chop.
.THURSDAY...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 7 seconds. Intracoastal waters light chop.
.THURSDAY NIGHT...South winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: East 3 feet at 7 seconds and southeast 2 feet at
3 seconds. Intracoastal waters light chop.
.FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
Intracoastal waters a moderate chop.
.SATURDAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
Intracoastal waters a moderate chop. A slight chance of showers
and thunderstorms in the afternoon. A chance of showers in the
evening, then a slight chance of showers after midnight.
Winds and waves higher in and near thunderstorms.
$$
AMZ470-472-220330-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-
820 AM EDT Tue Apr 21 2026
.REST OF TODAY...North winds 5 to 10 knots, becoming northeast
this afternoon. Seas 4 to 5 feet, occasionally to 6 feet. Wave
Detail: East 5 feet at 8 seconds.
.TONIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds.
.WEDNESDAY...East winds around 5 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 3 feet at
8 seconds.
.WEDNESDAY NIGHT...South winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 3 feet at
8 seconds.
.THURSDAY AND THURSDAY NIGHT...South winds 5 to 10 knots. Seas
2 to 3 feet. Wave Detail: East 3 feet at 7 seconds and south
2 feet at 3 seconds.
.FRIDAY...South winds 5 to 10 knots, increasing to 10 to
15 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at
5 seconds and southeast 3 feet at 8 seconds.
.SATURDAY...South winds 10 to 15 knots, becoming southwest 15 to
20 knots. Seas 2 to 3 feet. A slight chance of showers in the
afternoon. A slight chance of thunderstorms through the night. A
chance of showers through the night.
Winds and seas higher in and near thunderstorms.
$$
AMZ474-220330-
Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM-
820 AM EDT Tue Apr 21 2026
...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL NOON EDT TODAY...
.REST OF TODAY...Northeast winds 10 to 15 knots. Seas 4 to
6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at
8 seconds.
.TONIGHT...East winds 5 to 10 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 4 feet at
8 seconds.
.WEDNESDAY...East winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 4 feet at
8 seconds.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 3 to
4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at
8 seconds.
.THURSDAY AND THURSDAY NIGHT...South winds 5 to 10 knots. Seas
around 3 feet. Wave Detail: Northeast 3 feet at 7 seconds and
southeast 2 feet at 3 seconds.
.FRIDAY...South winds 5 to 10 knots, increasing to 10 to
15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at
8 seconds and southeast 2 feet at 4 seconds.
.SATURDAY...South winds 10 to 15 knots, becoming southwest 15 to
20 knots. Seas 2 to 3 feet. A slight chance of showers and
thunderstorms in the evening. A slight chance of showers after
midnight.
Winds and seas higher in and near thunderstorms.
$$
CWFJAX
Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
820 AM EDT Tue Apr 21 2026
Atlantic Coastal Waters from Altamaha Sound GA to Flagler Beach
FL out to 60 nm.
Seas are provided as a range of the average height of the highest
1/3 of the waves, along with the occasional height of the average
highest 1/10 of the waves.
AMZ400-220330-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
820 AM EDT Tue Apr 21 2026
.SYNOPSIS...
Winds and waves subside gradually tonight with exercise caution over
the offshore Florida waters through late morning as high pressure
builds across the area waters today. Easterly winds Today will
return Wednesday as high pressure remains over the waters with
southerly winds overnight due to the land breeze. Winds will turn
more southeasterly Thursday into Friday during the daytime's
seabreeze circulation with southerly winds prevailing ahead of a
cold front Saturday and southwesterly on Sunday as the front begins
to stall just north of the waters. The front will bring increasing
chances for showers and thunderstorms over the waters this weekend.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Apr 20, 2026 at 0000 UTC...
54 nautical miles east of Flagler Beach.
62 nautical miles east of Saint Augustine Beach.
74 nautical miles east southeast of Jacksonville Beach.
80 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-454-220330-
Coastal waters from Altamaha Sound to Fernandina Beach FL out
20 NM-
Coastal waters from Fernandina Beach to St. Augustine FL out
20 NM-
Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-
820 AM EDT Tue Apr 21 2026
.REST OF TODAY...North winds 5 to 10 knots, becoming east this
afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail:
East 4 feet at 8 seconds. Intracoastal waters light chop.
.TONIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds.
Intracoastal waters light chop.
.WEDNESDAY...Northeast winds around 5 knots, becoming east in the
afternoon. Seas 2 to 3 feet. Wave Detail: East 3 feet at
8 seconds. Intracoastal waters light chop.
.WEDNESDAY NIGHT...South winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: East 3 feet at 8 seconds. Intracoastal waters light
chop.
.THURSDAY...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 7 seconds. Intracoastal waters light chop.
.THURSDAY NIGHT...South winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: East 3 feet at 7 seconds and southeast 2 feet at
3 seconds. Intracoastal waters light chop.
.FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
Intracoastal waters a moderate chop.
.SATURDAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
Intracoastal waters a moderate chop. A slight chance of showers
and thunderstorms in the afternoon. A chance of showers in the
evening, then a slight chance of showers after midnight.
Winds and waves higher in and near thunderstorms.
$$
AMZ470-472-220330-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-
820 AM EDT Tue Apr 21 2026
.REST OF TODAY...North winds 5 to 10 knots, becoming northeast
this afternoon. Seas 4 to 5 feet, occasionally to 6 feet. Wave
Detail: East 5 feet at 8 seconds.
.TONIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds.
.WEDNESDAY...East winds around 5 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 3 feet at
8 seconds.
.WEDNESDAY NIGHT...South winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 3 feet at
8 seconds.
.THURSDAY AND THURSDAY NIGHT...South winds 5 to 10 knots. Seas
2 to 3 feet. Wave Detail: East 3 feet at 7 seconds and south
2 feet at 3 seconds.
.FRIDAY...South winds 5 to 10 knots, increasing to 10 to
15 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at
5 seconds and southeast 3 feet at 8 seconds.
.SATURDAY...South winds 10 to 15 knots, becoming southwest 15 to
20 knots. Seas 2 to 3 feet. A slight chance of showers in the
afternoon. A slight chance of thunderstorms through the night. A
chance of showers through the night.
Winds and seas higher in and near thunderstorms.
$$
AMZ474-220330-
Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM-
820 AM EDT Tue Apr 21 2026
...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL NOON EDT TODAY...
.REST OF TODAY...Northeast winds 10 to 15 knots. Seas 4 to
6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at
8 seconds.
.TONIGHT...East winds 5 to 10 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 4 feet at
8 seconds.
.WEDNESDAY...East winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 4 feet at
8 seconds.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 3 to
4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at
8 seconds.
.THURSDAY AND THURSDAY NIGHT...South winds 5 to 10 knots. Seas
around 3 feet. Wave Detail: Northeast 3 feet at 7 seconds and
southeast 2 feet at 3 seconds.
.FRIDAY...South winds 5 to 10 knots, increasing to 10 to
15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at
8 seconds and southeast 2 feet at 4 seconds.
.SATURDAY...South winds 10 to 15 knots, becoming southwest 15 to
20 knots. Seas 2 to 3 feet. A slight chance of showers and
thunderstorms in the evening. A slight chance of showers after
midnight.
Winds and seas higher in and near thunderstorms.
$$