023
FZUS52 KJAX 090529
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
129 AM 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.

AMZ400-092000-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
129 AM EDT Thu Oct 9 2025

.SYNOPSIS...

A frontal boundary crosses into the GA waters during the predawn
hours this morning and pushes towards the FL waters by late this
morning to early afternoon hours. Northeast winds will quickly
strengthen as a coastal trough develops over the near shore waters.
Showers and embedded storms will begin to increase in coverage
through Friday. Small Craft Advisory conditions are expected to
develop this morning. A Gale Warning has been posted from this
afternoon through Saturday night. 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 from Thursday night
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.


$$

AMZ452-454-092000-
Coastal waters from Fernandina Beach to St. Augustine FL out
20 NM-
Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-
129 AM EDT Thu Oct 9 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING
THROUGH THIS AFTERNOON...
...GALE WARNING IN EFFECT FROM THIS AFTERNOON THROUGH LATE
SATURDAY NIGHT...

.REST OF TONIGHT...East winds 10 to 15 knots, becoming northeast
15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet.
Intracoastal waters choppy.
.THURSDAY...Northeast winds 20 to 25 knots, increasing to 25 to
30 knots in the afternoon. Seas 5 to 6 feet, occasionally to
8 feet, building to 5 to 8 feet, occasionally to 10 feet in the
afternoon. Wave Detail: Northeast 4 feet at 5 seconds, becoming
northeast 7 feet at 6 seconds. Intracoastal waters very rough. A
chance of showers with a slight chance of thunderstorms in the
morning, then showers likely with a chance of thunderstorms in
the afternoon.
.THURSDAY NIGHT...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 7 seconds. Intracoastal waters very
rough. Showers and thunderstorms likely.
.FRIDAY...Northeast winds 25 to 30 knots. Seas 8 to 10 feet,
occasionally to 13 feet. Intracoastal waters very rough. Showers
with a chance of thunderstorms.
.FRIDAY NIGHT...Northeast winds 25 to 30 knots. Seas 4 to 6 feet,
occasionally to 8 feet, building to 8 to 10 feet, occasionally to
13 feet after midnight. Intracoastal waters very rough. Showers
likely with a chance of thunderstorms in the evening, then a
chance of showers with a slight chance of thunderstorms after
midnight.
.SATURDAY...North winds 25 to 30 knots, increasing to 30 to
35 knots in the afternoon. Seas 8 to 11 feet, occasionally to
14 feet. Wave Detail: North 5 feet at 6 seconds. Intracoastal
waters extremely rough. A chance of showers and thunderstorms.
.SATURDAY NIGHT...North winds 25 to 35 knots. Seas 10 to 12 feet,
occasionally to 15 feet, subsiding to 8 to 11 feet, occasionally
to 14 feet after midnight. Intracoastal waters extremely rough. A
slight chance of showers and thunderstorms in the evening.
.SUNDAY...North winds 20 to 25 knots, diminishing to 15 to
20 knots. Seas 7 to 10 feet, occasionally to 13 feet, subsiding
to 5 to 8 feet, occasionally to 10 feet. Intracoastal waters
rough.
.MONDAY...North winds 15 to 20 knots, becoming west. Seas 4 to
6 feet, occasionally to 8 feet. Intracoastal waters choppy.

Winds and waves higher in and near thunderstorms.

$$

AMZ450-092000-
Coastal waters from Altamaha Sound to Fernandina Beach FL out
20 NM-
129 AM EDT Thu Oct 9 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING
THROUGH THIS AFTERNOON...
...GALE WARNING IN EFFECT FROM THIS AFTERNOON THROUGH LATE
SATURDAY NIGHT...

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

Winds and waves higher in and near thunderstorms.

$$

AMZ472-474-092000-
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-
129 AM EDT Thu Oct 9 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING
THROUGH THIS AFTERNOON...
...GALE WARNING IN EFFECT FROM THIS AFTERNOON THROUGH LATE
SATURDAY NIGHT...

.REST OF TONIGHT...Northeast winds around 15 knots. Seas around
5 feet, occasionally to 6 feet. A slight chance of showers and
thunderstorms.
.THURSDAY...Northeast winds 15 to 20 knots, increasing to 20 to
25 knots with gusts up to 35 knots in the afternoon. Seas 5 to
6 feet, occasionally to 8 feet, building to 5 to 8 feet,
occasionally to 10 feet in the afternoon. Wave Detail: Northeast
3 feet at 6 seconds, becoming northeast 7 feet at 6 seconds. A
chance of showers with a slight chance of thunderstorms in the
morning, then showers likely with a chance of thunderstorms in
the afternoon.
.THURSDAY NIGHT...Northeast winds 25 to 30 knots, diminishing to
20 to 25 knots after midnight. Seas 7 to 10 feet, occasionally to
13 feet. Wave Detail: Northeast 8 feet at 7 seconds.
Thunderstorms likely. Showers.
.FRIDAY...Northeast winds 20 to 25 knots. Seas 8 to 10 feet,
occasionally to 13 feet. Showers with a chance of thunderstorms.
.FRIDAY NIGHT...Northeast winds 20 to 25 knots. Seas 4 to 6 feet,
occasionally to 8 feet, building to 8 to 10 feet, occasionally to
13 feet after midnight. A chance of thunderstorms. Showers.
.SATURDAY...North winds 25 to 30 knots. Seas 9 to 10 feet,
occasionally to 13 feet, building to 10 to 12 feet, occasionally
to 15 feet in the afternoon. Wave Detail: North 6 feet at
7 seconds. A chance of showers and thunderstorms.
.SATURDAY NIGHT...North winds 25 to 30 knots. Seas 10 to 12 feet,
occasionally to 15 feet. A chance of showers with a slight chance
of thunderstorms in the evening, then a slight chance of showers
after midnight.
.SUNDAY...North winds 20 to 25 knots, diminishing to 15 to
20 knots. Seas 7 to 10 feet, occasionally to 13 feet, subsiding
to 7 to 8 feet, occasionally to 10 feet after midnight. A slight
chance of showers through the day.
.MONDAY...Northwest winds 15 to 20 knots. Seas 6 to 7 feet,
occasionally to 9 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ470-092000-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
129 AM EDT Thu Oct 9 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING
THROUGH THIS AFTERNOON...
...GALE WARNING IN EFFECT FROM THIS AFTERNOON THROUGH LATE
SATURDAY NIGHT...

.REST OF TONIGHT...East winds around 10 knots, becoming northeast
15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave
Detail: Northeast 2 feet at 4 seconds. A slight chance of showers
and thunderstorms.
.THURSDAY...Northeast winds 20 to 25 knots, increasing to 25 to
30 knots in the afternoon. Seas 5 to 7 feet, occasionally to
9 feet, building to 6 to 9 feet, occasionally to 11 feet in the
afternoon. Wave Detail: Northeast 6 feet at 5 seconds, becoming
northeast 9 feet at 7 seconds. A chance of thunderstorms. A
chance of showers in the morning, then showers likely in the
afternoon.
.THURSDAY NIGHT...Northeast winds 25 to 30 knots. Seas 8 to
11 feet, occasionally to 14 feet, building to 10 to 11 feet,
occasionally to 14 feet after midnight. Wave Detail: Northeast
9 feet at 7 seconds, becoming northeast 2 feet at 4 seconds.
Showers likely with a chance of thunderstorms in the evening,
then showers with thunderstorms likely after midnight.
.FRIDAY...Northeast winds 25 to 30 knots. Seas 9 to 10 feet,
occasionally to 13 feet. Showers with a chance of thunderstorms.
.FRIDAY NIGHT...Northeast winds 25 to 30 knots. Seas 4 to 6 feet,
occasionally to 8 feet, building to 9 to 10 feet, occasionally to
13 feet after midnight. A chance of thunderstorms. Showers.
.SATURDAY...North winds 25 to 30 knots. Seas 10 to 11 feet,
occasionally to 14 feet. Wave Detail: North 3 feet at 6 seconds.
A chance of showers. A chance of thunderstorms, mainly in the
morning.
.SATURDAY NIGHT...North winds 25 to 30 knots. Seas 9 to 12 feet,
occasionally to 15 feet. A slight chance of showers.
.SUNDAY...North winds 20 to 25 knots, diminishing to around
15 knots. Seas 8 to 10 feet, occasionally to 13 feet, subsiding
to 6 to 7 feet, occasionally to 9 feet.
.MONDAY...Northwest winds 10 to 15 knots, increasing to 15 to
20 knots. Seas 5 to 7 feet, occasionally to 9 feet.

Winds and seas higher in and near thunderstorms.

$$