324
FZUS52 KJAX 200020
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
820 PM EDT Fri Sep 19 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.

AMZ400-201530-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
820 PM EDT Fri Sep 19 2025

.SYNOPSIS...

Northeast winds increase tonight through the weekend as high
pressure strengthens northeast of the region and a coastal trough
develops east of the Florida peninsula. Winds and seas build this
weekend, with Small Craft Exercise Caution conditions expected
over the waters by Saturday. The high and coastal trough weaken
through mid-week next week, relaxing the local gradient over the
waters.

.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Sep 18, 2025 at 1200 UTC...

 50 nautical miles east of Flagler Beach.
 58 nautical miles east northeast of Saint Augustine Beach.
 54 nautical miles east of Jacksonville Beach.
 81 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.


$$

AMZ450-452-454-201530-
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-
820 PM EDT Fri Sep 19 2025

.REST OF TONIGHT...East winds 10 to 15 knots, becoming northeast
5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave
Detail: East 3 feet at 7 seconds. Intracoastal waters a moderate
chop.
.SATURDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 3 feet at
4 seconds and east 3 feet at 8 seconds. Intracoastal waters a
moderate chop.
.SATURDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to
4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at
5 seconds and east 3 feet at 8 seconds. Intracoastal waters a
moderate chop.
.SUNDAY...Northeast winds 10 to 15 knots, increasing to 15 to
20 knots in the afternoon. Seas 3 to 4 feet, occasionally to
5 feet. Wave Detail: Northeast 4 feet at 5 seconds and east
3 feet at 8 seconds. Intracoastal waters choppy. A slight chance
of showers. A slight chance of thunderstorms in the afternoon.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds.
Intracoastal waters a moderate chop. A slight chance of showers
and thunderstorms.
.MONDAY...Northeast winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 3 feet at 7 seconds and
east 3 feet at 12 seconds. Intracoastal waters a moderate chop. A
chance of showers. A slight chance of thunderstorms in the
morning, then a chance of thunderstorms in the afternoon.
.MONDAY NIGHT...East winds 10 to 15 knots, diminishing to around
5 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet.
Intracoastal waters a moderate chop. A slight chance of showers
and thunderstorms.
.TUESDAY THROUGH WEDNESDAY...South winds 5 to 10 knots. Seas 2 to
4 feet, occasionally to 5 feet. Intracoastal waters light chop. A
slight chance of showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-201530-
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-
820 PM EDT Fri Sep 19 2025

.REST OF TONIGHT...Northeast winds 10 to 15 knots, diminishing to
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 showers and
thunderstorms.
.SATURDAY...Northeast winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds and
northeast 3 feet at 5 seconds. A slight chance of showers.
.SATURDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to
4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at
5 seconds and east 3 feet at 8 seconds. A slight chance of
showers and thunderstorms.
.SUNDAY...Northeast winds 10 to 15 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 4 feet at
5 seconds and east 3 feet at 8 seconds. A chance of showers with
a slight chance of thunderstorms.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: East 4 feet at 7 seconds and
east 2 feet at 13 seconds. A slight chance of thunderstorms. A
slight chance of showers in the evening, then a chance of showers
after midnight.
.MONDAY AND MONDAY NIGHT...East winds 10 to 15 knots. Seas 4 to
5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at
12 seconds and east 3 feet at 7 seconds. A chance of showers and
thunderstorms.
.TUESDAY...Northeast winds 5 to 10 knots, becoming south. Seas
3 to 5 feet, occasionally to 6 feet. A chance of showers and
thunderstorms, mainly in the morning.
.WEDNESDAY...North winds 5 to 10 knots, becoming south. Seas 3 to
4 feet, occasionally to 5 feet. A slight chance of thunderstorms.

Winds and seas higher in and near thunderstorms.

$$