309
FZUS52 KJAX 301845
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
145 PM EST Tue Dec 30 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.

AMZ400-310945-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
145 PM EST Tue Dec 30 2025

.SYNOPSIS...

Strong high pressure building eastward from Texas will slowly
weaken as it pushes eastward across the Gulf on Wednesday night
and Thursday, becoming centered over south Florida by Friday.
Gusty westerly winds will keep Caution conditions in place across
most of our local waters through Thursday. Winds will then shift
to southwesterly while briefly diminishing on Friday afternoon and
evening. Weak low pressure developing over the lower Mississippi
Valley on Friday will shift eastward across the southeastern
states on Saturday, moving offshore on Saturday night. This storm
system will bring showers and a few embedded thunderstorms to our
area on Saturday and Saturday night, along with Small Craft
Advisory conditions for the offshore waters. Breezy northerly
winds are then forecast in the wake of this storm system on
Sunday and Sunday night.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Dec 30, 2025 at 0000 UTC...

 54 nautical miles east of Flagler Beach.
 58 nautical miles east of Saint Augustine Beach.
 70 nautical miles east southeast of Jacksonville Beach.
 71 nautical miles east southeast of St Simons Island.

This data derived from NCEP Global RTOFS model.


$$

AMZ452-454-310945-
Coastal waters from Fernandina Beach to St. Augustine FL out
20 NM-
Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-
145 PM EST Tue Dec 30 2025

...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH WEDNESDAY
MORNING...

.TONIGHT...Northwest winds 15 to 20 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: North 4 feet at 6 seconds.
Intracoastal waters choppy.
.WEDNESDAY...Northwest winds 15 to 20 knots, becoming west
northwest around 15 knots in the afternoon. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: North 4 feet at 6 seconds.
Intracoastal waters becoming a moderate chop.
.WEDNESDAY NIGHT...West winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: West 3 feet at 4 seconds and
northeast 2 feet at 8 seconds. Intracoastal waters choppy.
.THURSDAY...West winds 15 to 20 knots, diminishing to 10 to 15
knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet.
Wave Detail: Northwest 3 feet at 4 seconds. Intracoastal waters
becoming a light chop.
.THURSDAY NIGHT AND FRIDAY...West southwest winds 10 to 15 knots,
becoming southwest around 10 knots during the afternoon. Seas
around 2 feet. Wave Detail: West 2 feet at 3 seconds.
Intracoastal waters a light chop.
.FRIDAY NIGHT...Southwest winds 10 to 15 knots, increasing to
15 to 20 knots after midnight. Seas 2 to 3 feet. Wave Detail:
Southwest 3 feet at 4 seconds. Intracoastal waters becoming
choppy. A slight chance of showers after midnight.
.SATURDAY AND SATURDAY NIGHT...Southwest winds 15 to 20 knots,
becoming northwest after midnight. Seas 2 to 4 feet, occasionally
to 5 feet. Intracoastal waters choppy. Showers likely with a slight
chance of thunderstorms through around midnight, then a chance of
showers after midnight.
.SUNDAY...North winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Intracoastal waters choppy. A slight
chance of showers in the morning.

Winds and waves higher in and near thunderstorms.

$$

AMZ450-310945-
Coastal waters from Altamaha Sound to Fernandina Beach FL out
20 NM-
145 PM EST Tue Dec 30 2025

.TONIGHT...Northwest winds around 15 knots. Seas 2 to 3 feet.
Wave Detail: North 2 feet at 4 seconds. Intracoastal waters a
moderate chop.
.WEDNESDAY...West winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: Northwest 2 feet at 3 seconds and northeast 2 feet at
6 seconds. Intracoastal waters a light  chop.
.WEDNESDAY NIGHT...West winds 10 to 15 knots, increasing to 15 to
20 knots after midnight. Seas 2 to 3 feet. Wave Detail: West 2
feet at 3 seconds and east 2 feet at 8 seconds. Intracoastal
waters becoming choppy.
.THURSDAY...West winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: West 2 feet at 3 seconds. Intracoastal waters a light
chop.
.THURSDAY NIGHT...West southwest winds 5 to 10 knots. Seas around
2 feet. Wave Detail: West 2 feet at 3 seconds. Intracoastal
waters mostly smooth.
.FRIDAY...Southwest winds 5 to 10 knots. Waves 1 foot or less.
Intracoastal waters mostly smooth.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots, increasing to
10 to 15 knots after midnight. Seas 2 to 3 feet. Intracoastal
waters a moderate chop. A chance of showers after midnight.
.SATURDAY AND SATURDAY NIGHT...Southwest winds 10 to 15 knots,
becoming northwest around 15 knots after midnight. Seas 2 to 3
feet. Intracoastal waters becoming a moderate chop. Showers with a
slight chance of thunderstorms through around midnight. A slight
chance of showers after midnight.
.SUNDAY...North winds around 15 knots. Seas 2 to 3 feet.
Intracoastal waters a moderate chop.

Winds and waves higher in and near thunderstorms.

$$

AMZ472-474-310945-
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-
145 PM EST Tue Dec 30 2025

...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH WEDNESDAY
AFTERNOON...

.TONIGHT...Northwest winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: North 5 feet at 7 seconds.
.WEDNESDAY...Northwest winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northwest 4 feet at
5 seconds and northeast 3 feet at 8 seconds.
.WEDNESDAY NIGHT...West winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northwest 5 feet at 5
seconds and northeast 2 feet at 8 seconds.
.THURSDAY...West winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: Northwest 5 feet at 5
seconds.
.THURSDAY NIGHT THROUGH FRIDAY NIGHT...West southwest winds 15 to
20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
Southwest 4 feet at 4 seconds.
.SATURDAY AND SATURDAY NIGHT...Southwest winds 20 to 25 knots, m
becoming northwest after midnight. Seas 4 to 6 feet, occasionally
to 8 feet. Wave Detail: Southwest 5 feet at 5 seconds. Showers
likely with a slight chance of thunderstorms through around
midnight. A chance of showers after midnight.
.SUNDAY...North winds 15 to 20 knots. Seas 3 to 4 feet,
occasionally to 5 feet. A chance of showers in the morning.

Winds and seas higher in and near thunderstorms.

$$

AMZ470-310945-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
145 PM EST Tue Dec 30 2025

...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH WEDNESDAY
MORNING...

.TONIGHT...Northwest winds 15 to 20 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: North 3 feet at 6 seconds.
.WEDNESDAY...Northwest winds 15 to 20 knots, becoming west around
15 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5
feet. Wave Detail: Northwest 3 feet at 4 seconds and northeast 2
feet at 8 seconds.
.WEDNESDAY NIGHT...West winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: West 4 feet at 4 seconds and
east 2 feet at 8 seconds.
.THURSDAY...West winds 15 to 20 knots, diminishing to 10 to 15
knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet.
Wave Detail: West 4 feet at 5 seconds.
.THURSDAY NIGHT AND FRIDAY...West southwest winds 10 to 15 knots.
Seas 2 to 3 feet. Wave Detail: West 3 feet at 4 seconds.
.FRIDAY NIGHT...Southwest winds 10 to 15 knots, increasing to
15 to 20 knots after midnight. Seas 2 to 4 feet, occasionally to
5 feet. Wave Detail: Southwest 4 feet at 5 seconds. A slight
chance of showers after midnight.
.SATURDAY AND SATURDAY NIGHT...Southwest winds 20 to 25 knots,
becoming northwest 15 to 20 knots after midnight. Seas 4 to 6
feet, occasionally to 8 feet. Showers with a slight chance of
thunderstorms through around midnight. A chance of showers after
midnight.
.SUNDAY...North winds around 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. A slight chance of showers.

Winds and seas higher in and near thunderstorms.

$$