540
FZUS52 KJAX 082151
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
551 PM EDT Tue Sep 8 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.

AMZ400-091300-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
551 PM EDT Tue Sep 8 2026

.SYNOPSIS...

A coastal trough developing today will persist through this
evening into Wednesday morning with waves of gusty showers and
isolated thunderstorms. Elevated winds and seas will bring
Exercise caution conditions to the waters north of St Augustine
through this late this evening. Winds will become easterly
Wednesday morning and gradually lessen as the trough begins to
weaken by late Wednesday Night as high pressure builds northeast
of the region. The high will then extend across the Florida
peninsula Thursday with southerly winds and a return of southwest
winds Friday into the weekend with the afternoon east coast sea
breeze.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Sep 08, 2026 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.
 76 nautical miles east southeast of St Simons Island.

This data derived from NCEP Global RTOFS model.


$$

AMZ450-452-470-091300-
Coastal waters from Altamaha Sound to Fernandina Beach FL out
20 NM-
Coastal waters from Fernandina Beach to St. Augustine FL out
20 NM-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
551 PM EDT Tue Sep 8 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 2 AM EDT
WEDNESDAY...

.TONIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 4 to 6 feet, occasionally to
8 feet. Wave Detail: Northeast 6 feet at 8 seconds. Intracoastal
waters choppy. A chance of showers. A slight chance of
thunderstorms.
.WEDNESDAY...East winds 10 to 15 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: East 5 feet at 8 seconds.
Intracoastal waters a moderate chop. A chance of showers with a
slight chance of thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots, becoming south
5 to 10 knots after midnight. Seas 3 to 5 feet, occasionally to
6 feet. Wave Detail: East 4 feet at 8 seconds. Intracoastal
waters a moderate chop. A slight chance of showers and
thunderstorms.
.THURSDAY...Southeast winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds.
Intracoastal waters light chop. A slight chance of showers and
thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon.
.THURSDAY NIGHT...South winds around 10 knots, becoming southwest
after midnight. Seas 2 to 3 feet. Wave Detail: East 3 feet at
7 seconds. Intracoastal waters light chop. A chance of showers
and thunderstorms.
.FRIDAY AND FRIDAY NIGHT...Southwest winds 5 to 10 knots. Seas
2 to 3 feet. Wave Detail: East 2 feet at 7 seconds and southeast
2 feet at 8 seconds. Intracoastal waters light chop. A chance of
showers and thunderstorms.
.SATURDAY THROUGH SUNDAY...South winds 5 to 10 knots. Seas 2 to
3 feet. Intracoastal waters light chop. A chance of showers and
thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

AMZ472-091300-
Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-
551 PM EDT Tue Sep 8 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 2 AM EDT
WEDNESDAY...

.TONIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas around 5 feet, occasionally to
6 feet. Wave Detail: Northeast 5 feet at 8 seconds. Showers
likely with a chance of thunderstorms this evening, then a chance
of showers with a slight chance of thunderstorms after midnight.
.WEDNESDAY...Southeast winds 10 to 15 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 5 feet at
8 seconds. A chance of showers with a slight chance of
thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 4 to
5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at
8 seconds. A slight chance of showers and thunderstorms.
.THURSDAY...Southeast winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds. A
slight chance of thunderstorms. A chance of showers, mainly in
the morning.
.THURSDAY NIGHT THROUGH FRIDAY NIGHT...Southwest 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. A chance of showers and
thunderstorms.
.SATURDAY...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 3 seconds and southeast 2 feet at
8 seconds. A chance of thunderstorms. Showers likely, mainly in
the morning.
.SUNDAY...South winds 5 to 10 knots. Seas 2 to 3 feet. A chance
of showers and thunderstorms, mainly in the morning.

Winds and seas higher in and near thunderstorms.

$$

AMZ454-091300-
Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-
551 PM EDT Tue Sep 8 2026

.TONIGHT...East winds 10 to 15 knots. Seas around 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 4 feet at
8 seconds. Intracoastal waters a moderate chop. A slight chance
of thunderstorms. A chance of showers, mainly this evening.
.WEDNESDAY...Southeast winds 10 to 15 knots. Seas around 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 4 feet at
8 seconds. Intracoastal waters a moderate chop. A chance of
showers with a slight chance of thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots, becoming south
5 to 10 knots after midnight. Seas 3 to 4 feet, occasionally to
5 feet. Wave Detail: Northeast 4 feet at 8 seconds. Intracoastal
waters a moderate chop.
.THURSDAY...Southeast winds 5 to 10 knots. Seas around 3 feet.
Wave Detail: East 3 feet at 8 seconds. Intracoastal waters light
chop. A slight chance of showers in the morning, then a chance of
showers and thunderstorms in the afternoon.
.THURSDAY NIGHT...South winds 5 to 10 knots, becoming southwest
after midnight. Seas 2 to 3 feet. Wave Detail: East 3 feet at
7 seconds. Intracoastal waters light chop. A slight chance of
showers and thunderstorms.
.FRIDAY...Southwest winds around 5 knots, becoming southeast in
the afternoon. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at
7 seconds and east 2 feet at 8 seconds. Intracoastal waters light
chop. A chance of showers and thunderstorms in the morning, then
showers and thunderstorms likely in the afternoon.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
Intracoastal waters light chop. A chance of showers and
thunderstorms, mainly in the evening.
.SATURDAY THROUGH SUNDAY...South winds 5 to 10 knots. Seas around
2 feet. Intracoastal waters light chop. A chance of showers and
thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

AMZ474-091300-
Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM-
551 PM EDT Tue Sep 8 2026

.TONIGHT...East winds 10 to 15 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 5 feet at
8 seconds. A chance of showers with a slight chance of
thunderstorms.
.WEDNESDAY...Southeast winds around 10 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 5 feet at
8 seconds. A chance of showers with a slight chance of
thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots, becoming south
5 to 10 knots after midnight. Seas 4 to 5 feet, occasionally to
6 feet. Wave Detail: East 5 feet at 8 seconds. A slight chance of
thunderstorms. A slight chance of showers in the evening, then a
chance of showers after midnight.
.THURSDAY...Southeast winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 4 feet at
8 seconds and east 2 feet at 8 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.THURSDAY NIGHT...South winds 5 to 10 knots. Seas around 3 feet.
Wave Detail: Northeast 2 feet at 7 seconds and east 2 feet at
8 seconds. A chance of showers and thunderstorms.
.FRIDAY AND FRIDAY NIGHT...South winds 5 to 10 knots. Seas 2 to
3 feet. Wave Detail: Southeast 2 feet at 3 seconds and northeast
2 feet at 7 seconds. Showers likely with a chance of
thunderstorms.
.SATURDAY THROUGH SUNDAY...South winds 5 to 10 knots. Seas 2 to
3 feet. A chance of showers and thunderstorms.

Winds and seas higher in and near thunderstorms.

$$