836
FZUS52 KJAX 130924
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
524 AM EDT Sun Sep 13 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.

AMZ400-140030-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
524 AM EDT Sun Sep 13 2026

.SYNOPSIS...

Offshore winds will continue across the area waters today and on
Monday, except for a sea breeze which will shift winds to the
southeast and south during the afternoon hours. Another good chance
of a couple of strong thunderstorms this afternoon and evening.
Strong gusty winds and very heavy rainfall will accompany the
stronger storms. On Monday, less thunderstorm activity is expected
and likely be limited to northeast Florida nearshore waters. From
Tuesday through Thursday, a strong northeast wind surge will bring
small craft advisory conditions, rough seas, and numerous showers
and a few thunderstorms over the area waters.

.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Sep 12, 2026 at 0000 UTC...

 50 nautical miles east of Flagler Beach.
 58 nautical miles east of Saint Augustine Beach.
 64 nautical miles east southeast of Jacksonville Beach.
 76 nautical miles east southeast of St Simons Island.

This data derived from NCEP Global RTOFS model.

$$

AMZ450-452-454-140030-
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-
524 AM EDT Sun Sep 13 2026

.TODAY...West winds 5 to 10 knots, becoming southeast this
afternoon. Seas around 2 feet. Wave Detail: Southeast 2 feet at
8 seconds. Intracoastal waters light chop. A slight chance of
showers and thunderstorms this afternoon.
.TONIGHT...South winds 5 to 10 knots, becoming west after
midnight. Seas around 2 feet. Wave Detail: Southeast 2 feet at
9 seconds. Intracoastal waters light chop. A slight chance of
showers and thunderstorms in the evening.
.MONDAY...Northwest winds 5 to 10 knots, becoming east in the
afternoon. Seas around 2 feet. Wave Detail: Southeast 2 feet at
9 seconds. Intracoastal waters light chop.
.MONDAY NIGHT...Southeast winds around 5 knots, becoming east
after midnight. Seas around 2 feet. Wave Detail: East 2 feet at
9 seconds. Intracoastal waters light chop.
.TUESDAY...Northeast winds 15 to 20 knots, increasing to 25 to
30 knots in the afternoon. Seas 2 to 3 feet, building to 4 to
6 feet, occasionally to 8 feet in the afternoon. Wave Detail:
Northeast 3 feet at 4 seconds and east 2 feet at 9 seconds,
becoming northeast 6 feet at 5 seconds and northeast 5 feet at
9 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.
.TUESDAY NIGHT...Northeast winds 20 to 25 knots. Seas 5 to
8 feet, occasionally to 10 feet. Wave Detail: Northeast 7 feet at
6 seconds. Intracoastal waters rough. A chance of showers with a
slight chance of thunderstorms in the evening, then a slight
chance of showers after midnight.
.WEDNESDAY...Northeast winds 25 to 30 knots. Seas 6 to 8 feet,
occasionally to 10 feet. Intracoastal waters very rough. A chance
of showers and slight chance of thunderstorms.
.THURSDAY...Northeast winds 20 to 25 knots, becoming east 15 to
20 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to
4 to 5 feet, occasionally to 6 feet after midnight. Intracoastal
waters rough. Showers likely and a chance of thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-140030-
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-
524 AM EDT Sun Sep 13 2026

.TODAY...West winds 5 to 10 knots, becoming south this afternoon.
Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 8 seconds.
.TONIGHT...Southwest winds around 10 knots, becoming west after
midnight. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at
9 seconds. A slight chance of showers and thunderstorms in the
evening.
.MONDAY...Northwest winds 5 to 10 knots, becoming northeast in
the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at
9 seconds. A slight chance of showers and thunderstorms in the
morning.
.MONDAY NIGHT...East winds around 5 knots, increasing to 5 to
10 knots after midnight. Seas around 2 feet. Wave Detail: East
2 feet at 9 seconds.
.TUESDAY...Northeast winds 15 to 20 knots, increasing to 20 to
25 knots in the afternoon. Seas 2 to 4 feet, occasionally to
5 feet, building to 4 to 6 feet, occasionally to 8 feet in the
afternoon. Wave Detail: Northeast 3 feet at 4 seconds and east
2 feet at 9 seconds, becoming northeast 6 feet at 9 seconds and
northeast 5 feet at 5 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.
.TUESDAY NIGHT...Northeast winds 20 to 25 knots. Seas 5 to
8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at
6 seconds and east 2 feet at 9 seconds. A slight chance of
thunderstorms. A chance of showers, mainly in the evening.
.WEDNESDAY...Northeast winds 20 to 25 knots. Seas 6 to 8 feet,
occasionally to 10 feet. A chance of showers and slight chance of
thunderstorms.
.THURSDAY...Northeast winds 15 to 20 knots, becoming east 10 to
15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Showers
likely and a chance of thunderstorms.

Winds and seas higher in and near thunderstorms.

$$