189
FZUS52 KJAX 301215
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
815 AM EDT Sat Aug 30 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.

AMZ400-310315-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
815 AM EDT Sat Aug 30 2025

.SYNOPSIS...

A stationary front will linger across the northeast Florida waters
this weekend as strong high pressure over the Great Lakes begins to
wedge down the southeastern seaboard, sending a surge of
northeasterly winds and building seas across our local waters from
north to south on Sunday. Waves of showers and embedded
thunderstorms will impact our local waters this weekend, with
stronger storms capable of producing excessive lightning, strong
winds, and waterspouts. Northeasterly winds will likely peak at
Small Craft Advisory levels on Monday and will then gradually weaken
by late Tuesday and Wednesday. Widespread showers and embedded
thunderstorms will continue through midweek, with less coverage
expected ahead of an approaching cold front later in the week.
Prevailing winds will shift to offshore ahead of this approaching
cold front, allowing seas to gradually subside.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Aug 28, 2025 at 1200 UTC...

 36 nautical miles east of Flagler Beach.
 46 nautical miles east of Saint Augustine Beach.
 56 nautical miles east of Jacksonville Beach.
 71 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.


$$

AMZ450-452-454-310315-
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-
815 AM EDT Sat Aug 30 2025

.TODAY...Southeast winds around 10 knots, becoming northeast this
afternoon. Seas 2 to 3 feet. Wave Detail: East 2 feet at
5 seconds. Intracoastal waters a moderate chop. Showers likely
with a chance of thunderstorms.
.TONIGHT...North winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 3 feet at 5 seconds. Intracoastal waters a
moderate chop. Showers likely with a chance of thunderstorms in
the evening, then a chance of showers with a slight chance of
thunderstorms after midnight.
.SUNDAY...North winds 10 to 15 knots, becoming northeast 15 to
20 knots in the afternoon. Seas 3 to 5 feet, occasionally to
6 feet. Wave Detail: Northeast 3 feet at 5 seconds and east
3 feet at 8 seconds. Intracoastal waters choppy. A chance of
thunderstorms. Showers.
.SUNDAY NIGHT...Northeast winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 5 feet at
6 seconds. Intracoastal waters choppy. A chance of thunderstorms.
Showers likely, mainly in the evening.
.MONDAY...Northeast winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: Northeast 5 feet at
6 seconds. Intracoastal waters choppy. Showers likely. A chance
of thunderstorms in the morning, then thunderstorms likely in the
afternoon.
.MONDAY NIGHT...Northeast winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: Northeast 5 feet at
7 seconds and northeast 2 feet at 4 seconds. Intracoastal waters
choppy. A chance of showers. A chance of thunderstorms, mainly in
the evening.
.TUESDAY THROUGH WEDNESDAY...Northwest winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet. Intracoastal waters choppy.
Showers likely with a chance of thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-310315-
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-
815 AM EDT Sat Aug 30 2025

.TODAY...Southeast winds around 10 knots, becoming northeast this
afternoon. Seas 2 to 3 feet. Wave Detail: East 3 feet at
5 seconds and east 2 feet at 8 seconds. Showers with
thunderstorms likely this morning, then showers likely with a
chance of thunderstorms this afternoon.
.TONIGHT...North winds 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 3 feet at
5 seconds and east 2 feet at 8 seconds. Showers likely with a
chance of thunderstorms in the evening, then a chance of showers
with a slight chance of thunderstorms after midnight.
.SUNDAY...North winds 10 to 15 knots, becoming northeast 15 to
20 knots in the afternoon. Seas 3 to 5 feet, occasionally to
6 feet. Wave Detail: Northeast 5 feet at 8 seconds and north
3 feet at 4 seconds. Showers with a chance of thunderstorms.
.SUNDAY NIGHT...Northeast winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 5 feet at
8 seconds and northeast 3 feet at 5 seconds. Showers with a
chance of thunderstorms.
.MONDAY AND MONDAY NIGHT...Northeast winds 15 to 20 knots. Seas
4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast
6 feet at 7 seconds. Showers with a chance of thunderstorms.
.TUESDAY THROUGH WEDNESDAY...West winds 15 to 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at
8 seconds. Showers likely with a chance of thunderstorms.

Winds and seas higher in and near thunderstorms.

$$