FZUS52 KJAX 180529
CWFJAX
Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
1229 AM EST Thu Dec 18 2025
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.
AMZ400-182000-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
1229 AM EST Thu Dec 18 2025
.SYNOPSIS...
A weak trough over the northeast Florida waters will lift northward
as a warm front on Tuesday, moving north of the Georgia waters by
early Thursday afternoon. Scattered showers will develop over our
local waters tonight and Thursday morning, followed by increasing
chances for showers and a few embedded thunderstorms well in advance
of an approaching cold front on Thursday afternoon and evening.
Southeasterly winds will gradually strengthen overnight and Thursday
morning, followed by south-southwesterly winds on Thursday night
that will reach Caution levels near shore and Small Craft Advisory
levels offshore. Winds will then shift to westerly during the
passage of this weakening cold front on Thursday morning, with
northwest and then northerly winds developing following the frontal
passage. High pressure will then settle over our local waters during
the weekend, allowing for winds and seas to diminish. A weakening
frontal boundary will approach our region from the north on Monday
as strong high pressure builds over the Mid-Atlantic states, with
this feature potentially wedging down the southeastern seaboard on
Monday night and Tuesday as another coastal trough develops over our
local waters. This feature may develop showers over our local waters
early next week.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Dec 17, 2025 at 0000 UTC...
46 nautical miles east of Flagler Beach.
53 nautical miles east of Saint Augustine Beach.
64 nautical miles east southeast of Jacksonville Beach.
71 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-454-182000-
Coastal waters from Altamaha Sound to Fernandina Beach FL out
20 NM-
Coastal waters from Fernandina Beach to St. Augustine FL out
20 NM-
Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-
1229 AM EST Thu Dec 18 2025
.REST OF TONIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Southeast 4 feet at
6 seconds and east 3 feet at 9 seconds. Intracoastal waters light
chop. A chance of showers.
.THURSDAY...Southeast winds 10 to 15 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East 4 feet at 6 seconds and
east 4 feet at 10 seconds. Intracoastal waters a moderate chop. A
chance of showers with a slight chance of thunderstorms.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Southeast 5 feet at
7 seconds and southwest 2 feet at 5 seconds. Intracoastal waters
a moderate chop. A chance of showers with a slight chance of
thunderstorms.
.FRIDAY...West winds 10 to 15 knots, becoming northwest in the
afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail:
Southeast 5 feet at 8 seconds and west 2 feet at 4 seconds.
Intracoastal waters a moderate chop.
.FRIDAY NIGHT AND SATURDAY...Northeast winds 10 to 15 knots. Seas
3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at
9 seconds and north 3 feet at 4 seconds. Intracoastal waters a
moderate chop.
.SATURDAY NIGHT...Northeast winds around 5 knots, becoming
northwest after midnight. Seas 2 to 3 feet. Wave Detail: East
3 feet at 9 seconds. Intracoastal waters smooth.
.SUNDAY...North winds 5 to 10 knots, becoming northeast 20 to
25 knots. Seas 2 to 4 feet, occasionally to 5 feet, building to
4 to 6 feet, occasionally to 8 feet after midnight. Intracoastal
waters rough.
.MONDAY...Northeast winds 20 to 25 knots. Seas 5 to 8 feet,
occasionally to 10 feet. Intracoastal waters rough.
Winds and waves higher in and near thunderstorms.
$$
AMZ470-472-474-182000-
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-
Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM-
1229 AM EST Thu Dec 18 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
FRIDAY MORNING...
.REST OF TONIGHT...Southeast winds 15 to 20 knots, diminishing to
10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave
Detail: Southeast 5 feet at 5 seconds and east 5 feet at
9 seconds. A slight chance of showers late this evening, then a
chance of showers.
.THURSDAY...Southeast winds 15 to 20 knots. Seas 5 to 7 feet,
occasionally to 9 feet. Wave Detail: Southeast 6 feet at
7 seconds. A chance of showers with a slight chance of
thunderstorms.
.THURSDAY NIGHT...South winds 15 to 20 knots, becoming southwest
20 to 25 knots after midnight. Seas 5 to 8 feet, occasionally to
10 feet. Wave Detail: Southeast 7 feet at 8 seconds and southwest
3 feet at 5 seconds. A chance of showers with a slight chance of
thunderstorms.
.FRIDAY...West winds 15 to 20 knots, becoming northwest 10 to
15 knots in the afternoon. Seas 5 to 7 feet, occasionally to
9 feet. Wave Detail: Southeast 6 feet at 8 seconds and west
3 feet at 5 seconds. A slight chance of showers in the morning.
.FRIDAY NIGHT AND SATURDAY...Northeast winds 10 to 15 knots. Seas
3 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast
5 feet at 9 seconds and north 3 feet at 4 seconds.
.SATURDAY NIGHT...East winds around 5 knots, becoming west after
midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail:
East 4 feet at 9 seconds.
.SUNDAY...Northwest winds 5 to 10 knots, becoming northeast 20 to
25 knots. Seas 3 to 5 feet, occasionally to 6 feet, building to
5 to 7 feet, occasionally to 9 feet after midnight.
.MONDAY...East winds 20 to 25 knots. Seas 6 to 8 feet,
occasionally to 10 feet. A slight chance of showers.
Winds and seas higher in and near thunderstorms.
$$
CWFJAX
Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
1229 AM EST Thu Dec 18 2025
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.
AMZ400-182000-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
1229 AM EST Thu Dec 18 2025
.SYNOPSIS...
A weak trough over the northeast Florida waters will lift northward
as a warm front on Tuesday, moving north of the Georgia waters by
early Thursday afternoon. Scattered showers will develop over our
local waters tonight and Thursday morning, followed by increasing
chances for showers and a few embedded thunderstorms well in advance
of an approaching cold front on Thursday afternoon and evening.
Southeasterly winds will gradually strengthen overnight and Thursday
morning, followed by south-southwesterly winds on Thursday night
that will reach Caution levels near shore and Small Craft Advisory
levels offshore. Winds will then shift to westerly during the
passage of this weakening cold front on Thursday morning, with
northwest and then northerly winds developing following the frontal
passage. High pressure will then settle over our local waters during
the weekend, allowing for winds and seas to diminish. A weakening
frontal boundary will approach our region from the north on Monday
as strong high pressure builds over the Mid-Atlantic states, with
this feature potentially wedging down the southeastern seaboard on
Monday night and Tuesday as another coastal trough develops over our
local waters. This feature may develop showers over our local waters
early next week.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Dec 17, 2025 at 0000 UTC...
46 nautical miles east of Flagler Beach.
53 nautical miles east of Saint Augustine Beach.
64 nautical miles east southeast of Jacksonville Beach.
71 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-454-182000-
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-
1229 AM EST Thu Dec 18 2025
.REST OF TONIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Southeast 4 feet at
6 seconds and east 3 feet at 9 seconds. Intracoastal waters light
chop. A chance of showers.
.THURSDAY...Southeast winds 10 to 15 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East 4 feet at 6 seconds and
east 4 feet at 10 seconds. Intracoastal waters a moderate chop. A
chance of showers with a slight chance of thunderstorms.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Southeast 5 feet at
7 seconds and southwest 2 feet at 5 seconds. Intracoastal waters
a moderate chop. A chance of showers with a slight chance of
thunderstorms.
.FRIDAY...West winds 10 to 15 knots, becoming northwest in the
afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail:
Southeast 5 feet at 8 seconds and west 2 feet at 4 seconds.
Intracoastal waters a moderate chop.
.FRIDAY NIGHT AND SATURDAY...Northeast winds 10 to 15 knots. Seas
3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at
9 seconds and north 3 feet at 4 seconds. Intracoastal waters a
moderate chop.
.SATURDAY NIGHT...Northeast winds around 5 knots, becoming
northwest after midnight. Seas 2 to 3 feet. Wave Detail: East
3 feet at 9 seconds. Intracoastal waters smooth.
.SUNDAY...North winds 5 to 10 knots, becoming northeast 20 to
25 knots. Seas 2 to 4 feet, occasionally to 5 feet, building to
4 to 6 feet, occasionally to 8 feet after midnight. Intracoastal
waters rough.
.MONDAY...Northeast winds 20 to 25 knots. Seas 5 to 8 feet,
occasionally to 10 feet. Intracoastal waters rough.
Winds and waves higher in and near thunderstorms.
$$
AMZ470-472-474-182000-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-
Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM-
1229 AM EST Thu Dec 18 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
FRIDAY MORNING...
.REST OF TONIGHT...Southeast winds 15 to 20 knots, diminishing to
10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave
Detail: Southeast 5 feet at 5 seconds and east 5 feet at
9 seconds. A slight chance of showers late this evening, then a
chance of showers.
.THURSDAY...Southeast winds 15 to 20 knots. Seas 5 to 7 feet,
occasionally to 9 feet. Wave Detail: Southeast 6 feet at
7 seconds. A chance of showers with a slight chance of
thunderstorms.
.THURSDAY NIGHT...South winds 15 to 20 knots, becoming southwest
20 to 25 knots after midnight. Seas 5 to 8 feet, occasionally to
10 feet. Wave Detail: Southeast 7 feet at 8 seconds and southwest
3 feet at 5 seconds. A chance of showers with a slight chance of
thunderstorms.
.FRIDAY...West winds 15 to 20 knots, becoming northwest 10 to
15 knots in the afternoon. Seas 5 to 7 feet, occasionally to
9 feet. Wave Detail: Southeast 6 feet at 8 seconds and west
3 feet at 5 seconds. A slight chance of showers in the morning.
.FRIDAY NIGHT AND SATURDAY...Northeast winds 10 to 15 knots. Seas
3 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast
5 feet at 9 seconds and north 3 feet at 4 seconds.
.SATURDAY NIGHT...East winds around 5 knots, becoming west after
midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail:
East 4 feet at 9 seconds.
.SUNDAY...Northwest winds 5 to 10 knots, becoming northeast 20 to
25 knots. Seas 3 to 5 feet, occasionally to 6 feet, building to
5 to 7 feet, occasionally to 9 feet after midnight.
.MONDAY...East winds 20 to 25 knots. Seas 6 to 8 feet,
occasionally to 10 feet. A slight chance of showers.
Winds and seas higher in and near thunderstorms.
$$