388
FZUS52 KJAX 091628
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
1228 PM EDT Thu Oct 9 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.

AMZ400-100730-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
1228 PM EDT Thu Oct 9 2025

.SYNOPSIS...

Northeast winds will continue to strengthen as a coastal trough
develops over the near shore waters tonight. Showers and
embedded storms will begin to increase in coverage through Friday.
Gale Warning will remain posted through Saturday night with
frequent gusts to gale force are expected. Low pressure will then
develop along the frontal boundary over the Gulf Stream waters
adjacent to our region on Friday, with this feature gradually
strengthening as it moves northward towards the Carolinas this
weekend. Strong north- northeasterly winds and building, very
rough surf will create dangerous conditions throughout our local
waters through early Sunday. Northerly winds will gradually
subside late this weekend into early next week, with elevated seas
also likely slow to subside across our local waters.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Oct 07, 2025 at 1200 UTC...

 50 nautical miles east of Flagler Beach.
 59 nautical miles east of Saint Augustine Beach.
 70 nautical miles east of Jacksonville Beach.
 86 nautical miles east of St Simons Island.

This data courtesy of the Naval Oceanographic Office.


$$

AMZ452-454-100730-
Coastal waters from Fernandina Beach to St. Augustine FL out
20 NM-
Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-
1228 PM EDT Thu Oct 9 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...
...GALE WARNING IN EFFECT THROUGH LATE SATURDAY NIGHT...

.REST OF TODAY...Northeast winds 20 to 25 knots, increasing to
25 to 30 knots this afternoon. Seas 5 to 7 feet, occasionally to
9 feet. Wave Detail: Northeast 7 feet at 7 seconds. Intracoastal
waters very rough. Showers likely with a slight chance of
thunderstorms late this morning, then showers with a chance of
thunderstorms this afternoon.
.TONIGHT...Northeast winds 25 to 30 knots, diminishing to 20 to
25 knots after midnight. Seas 6 to 9 feet, occasionally to
11 feet. Wave Detail: East 8 feet at 8 seconds. Intracoastal
waters very rough. Showers with a chance of thunderstorms.
.FRIDAY...Northeast winds 25 to 30 knots with gusts up to
40 knots. Seas 7 to 9 feet, occasionally to 11 feet. Wave Detail:
Northeast 9 feet at 8 seconds. Intracoastal waters very rough.
Showers with a chance of thunderstorms.
.FRIDAY NIGHT...Northeast winds 25 to 30 knots with gusts up to
40 knots. Seas 8 to 10 feet, occasionally to 13 feet. Wave
Detail: Northeast 9 feet at 8 seconds and northeast 3 feet at
5 seconds. Intracoastal waters very rough. Showers likely with a
chance of thunderstorms.
.SATURDAY...North winds 25 to 30 knots with gusts up to 45 knots.
Seas 9 to 11 feet, occasionally to 14 feet. Wave Detail:
Northeast 11 feet at 10 seconds and north 6 feet at 7 seconds.
Intracoastal waters very rough. A chance of showers and
thunderstorms.
.SATURDAY NIGHT...North winds 25 to 30 knots with gusts up to
45 knots, diminishing to 15 to 20 knots after midnight. Seas 8 to
11 feet, occasionally to 14 feet, subsiding to 7 to 9 feet,
occasionally to 11 feet after midnight. Wave Detail: Northeast
11 feet at 8 seconds and north 5 feet at 7 seconds, becoming
northeast 9 feet at 9 seconds and north 7 feet at 7 seconds.
Intracoastal waters very rough. A slight chance of showers and
thunderstorms in the evening.
.SUNDAY...North winds 15 to 20 knots, becoming northwest 10 to
15 knots. Seas 5 to 8 feet, occasionally to 10 feet, subsiding to
5 to 6 feet, occasionally to 8 feet after midnight. Intracoastal
waters choppy.
.MONDAY...North winds 10 to 15 knots, becoming west. Seas 4 to
6 feet, occasionally to 8 feet. Intracoastal waters a moderate
chop.

Winds and waves higher in and near thunderstorms.

$$

AMZ450-100730-
Coastal waters from Altamaha Sound to Fernandina Beach FL out
20 NM-
1228 PM EDT Thu Oct 9 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...
...GALE WARNING IN EFFECT THROUGH LATE SATURDAY NIGHT...

.REST OF TODAY...Northeast winds 25 to 30 knots with gusts up to
40 knots. Seas 5 to 6 feet, occasionally to 8 feet, building to
5 to 8 feet, occasionally to 10 feet this afternoon. Wave Detail:
Northeast 5 feet at 5 seconds and east 3 feet at 8 seconds,
becoming northeast 8 feet at 7 seconds and east 2 feet at
8 seconds. Intracoastal waters very rough. A chance of showers
with a slight chance of thunderstorms late this morning, then
showers with a chance of thunderstorms this afternoon.
.TONIGHT...Northeast winds 25 to 30 knots with gusts up to
40 knots. Seas 7 to 10 feet, occasionally to 13 feet. Wave
Detail: Northeast 9 feet at 8 seconds. Intracoastal waters very
rough. Showers with a chance of thunderstorms.
.FRIDAY...Northeast winds 25 to 30 knots with gusts up to
40 knots. Seas 7 to 10 feet, occasionally to 13 feet. Wave
Detail: Northeast 9 feet at 8 seconds and northeast 2 feet at
4 seconds. Intracoastal waters very rough. Showers likely with a
chance of thunderstorms.
.FRIDAY NIGHT...Northeast winds 25 to 30 knots with gusts up to
40 knots. Seas 7 to 9 feet, occasionally to 11 feet. Wave Detail:
Northeast 9 feet at 8 seconds. Intracoastal waters very rough.
Showers likely with a chance of thunderstorms.
.SATURDAY...North winds 25 to 30 knots with gusts up to 40 knots.
Seas 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast
9 feet at 10 seconds and north 4 feet at 7 seconds. Intracoastal
waters very rough. A chance of showers with a slight chance of
thunderstorms.
.SATURDAY NIGHT...North winds 25 to 30 knots with gusts up to
40 knots, diminishing to 15 to 20 knots after midnight. Seas 6 to
9 feet, occasionally to 11 feet. Wave Detail: Northeast 9 feet at
9 seconds and north 4 feet at 6 seconds. Intracoastal waters very
rough. A slight chance of showers and thunderstorms in the
evening.
.SUNDAY...Northwest winds 15 to 20 knots, diminishing to 10 to
15 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to
4 to 5 feet, occasionally to 6 feet after midnight. Intracoastal
waters choppy.
.MONDAY...Northwest winds 10 to 15 knots, becoming west 5 to
10 knots. Seas 4 to 5 feet, occasionally to 6 feet. Intracoastal
waters a moderate chop.

Winds and waves higher in and near thunderstorms.

$$

AMZ472-474-100730-
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-
1228 PM EDT Thu Oct 9 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...
...GALE WARNING IN EFFECT THROUGH LATE SATURDAY NIGHT...

.REST OF TODAY...Northeast winds 20 to 25 knots. Gusts up to
35 knots this afternoon. Seas 5 to 7 feet, occasionally to
9 feet. Wave Detail: East 6 feet at 7 seconds. A chance of
showers with a slight chance of thunderstorms late this morning,
then showers with a chance of thunderstorms this afternoon.
.TONIGHT...Northeast winds 20 to 25 knots with gusts up to
35 knots. Seas 6 to 9 feet, occasionally to 11 feet. Wave Detail:
Northeast 9 feet at 8 seconds. Showers with a chance of
thunderstorms.
.FRIDAY...Northeast winds 20 to 25 knots with gusts up to
35 knots. Seas 8 to 9 feet, occasionally to 11 feet. Wave Detail:
Northeast 9 feet at 8 seconds. Showers. Thunderstorms likely,
mainly in the morning.
.FRIDAY NIGHT...Northeast winds 20 to 25 knots with gusts up to
35 knots. Seas 8 to 10 feet, occasionally to 13 feet. Wave
Detail: Northeast 10 feet at 10 seconds. A chance of
thunderstorms. Showers.
.SATURDAY AND SATURDAY NIGHT...North winds 25 to 30 knots with
gusts up to 40 knots. Seas 8 to 11 feet, occasionally to 14 feet.
Wave Detail: Northeast 11 feet at 10 seconds and north 9 feet at
8 seconds. A chance of showers and thunderstorms.
.SUNDAY...Northwest winds 15 to 20 knots, diminishing to 10 to
15 knots. Seas 6 to 9 feet, occasionally to 11 feet. Wave Detail:
North 9 feet at 9 seconds and north 6 feet at 7 seconds.
.MONDAY...Northwest winds 10 to 15 knots, becoming west. Seas
6 to 8 feet, occasionally to 10 feet, subsiding to 5 to 6 feet,
occasionally to 8 feet after midnight.

Winds and seas higher in and near thunderstorms.

$$

AMZ470-100730-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
1228 PM EDT Thu Oct 9 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...
...GALE WARNING IN EFFECT THROUGH LATE SATURDAY NIGHT...

.REST OF TODAY...Northeast winds 20 to 25 knots, increasing to
25 to 30 knots this afternoon. Seas 6 to 7 feet, occasionally to
9 feet, building to 6 to 9 feet, occasionally to 11 feet this
afternoon. Wave Detail: Northeast 5 feet at 5 seconds and east
4 feet at 8 seconds, becoming northeast 9 feet at 7 seconds and
east 4 feet at 8 seconds. A chance of showers with a slight
chance of thunderstorms late this morning, then showers with a
chance of thunderstorms this afternoon.
.TONIGHT...Northeast winds 25 to 30 knots with gusts up to
40 knots. Seas 8 to 10 feet, occasionally to 13 feet. Wave
Detail: East 10 feet at 8 seconds. Showers with a chance of
thunderstorms.
.FRIDAY...Northeast winds around 25 knots with gusts up to
35 knots. Seas 9 to 10 feet, occasionally to 13 feet. Wave
Detail: Northeast 10 feet at 9 seconds. Showers with a chance of
thunderstorms.
.FRIDAY NIGHT...Northeast winds around 25 knots with gusts up to
40 knots. Seas 9 to 10 feet, occasionally to 13 feet. Wave
Detail: Northeast 10 feet at 9 seconds. Showers with
thunderstorms likely in the evening, then showers likely with a
chance of thunderstorms after midnight.
.SATURDAY...North winds 25 to 30 knots with gusts up to 40 knots.
Seas 10 to 11 feet, occasionally to 14 feet. Wave Detail:
Northeast 11 feet at 10 seconds and north 5 feet at 7 seconds. A
chance of showers and thunderstorms.
.SATURDAY NIGHT...North winds 25 to 30 knots with gusts up to
40 knots, diminishing to 15 to 20 knots after midnight. Seas 9 to
11 feet, occasionally to 14 feet, subsiding to 7 to 10 feet,
occasionally to 13 feet after midnight. Wave Detail: Northeast
11 feet at 9 seconds and north 6 feet at 7 seconds, becoming
northeast 10 feet at 10 seconds and north 5 feet at 7 seconds. A
slight chance of thunderstorms in the evening. A slight chance of
showers.
.SUNDAY THROUGH MONDAY...West winds 15 to 20 knots. Seas 5 to
8 feet, occasionally to 10 feet.

Winds and seas higher in and near thunderstorms.

$$