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FZUS52 KJAX 231412 CCA
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia...Corrected
National Weather Service Jacksonville FL
1012 AM EDT Sat Aug 23 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.

AMZ400-240515-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
1012 AM EDT Sat Aug 23 2025

.SYNOPSIS...

Long period swells emanating from post Tropical Cyclone Erin will
keep combined  seas elevated through the weekend, especially
offshore. Meanwhile, a stationary frontal boundary near the Florida
and Georgia border will remain in place through the weekend. Rounds
of showers and thunderstorms will impact our local waters through
Monday evening. The frontal boundary will then shift southward on
Tuesday, stalling across the Florida peninsula towards midweek,
resulting in a decreasing coverage of showers and thunderstorms for
our area on Tuesday. Breezy northeasterly winds will then develop by
midweek as high pressure builds over the Ohio Valley and coastal
troughing develops over the near shore waters, possibly bringing an
increasing coverage of showers and thunderstorms to the northeast
Florida waters.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Aug 23, 2025 at 1200 UTC...

 57 nautical miles east of Flagler Beach.
 69 nautical miles east southeast of Saint Augustine Beach.
 75 nautical miles east of Jacksonville Beach.
 77 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.


$$

AMZ450-452-454-240515-
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-
1012 AM EDT Sat Aug 23 2025

.REST OF TODAY...West southwest winds 5 to 10 knots, becoming
east northeast around 10 knots this afternoon. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 4 feet at 15
seconds and southeast 2 feet at 6 seconds. Intracoastal waters
becoming a light chop. Showers and thunderstorms likely
.TONIGHT...West southwest winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 4 feet at 14
seconds and southeast 2 feet at 6 seconds. Intracoastal waters
mostly smooth. A chance of showers and thunderstorms, mainly in
the evening.
.SUNDAY...West northwest winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 4 feet at 13
seconds and southeast 2 feet at 6 seconds. Intracoastal waters
mostly smooth. A chance of showers and thunderstorms in the
morning, then showers and thunderstorms likely in the afternoon.
.SUNDAY NIGHT...West northwest winds 5 to 10 knots. Seas 3 to 4
feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 13
seconds and southeast 2 feet at 6 seconds. Intracoastal waters
mostly smooth. A chance of showers and thunderstorms, mainly in
the evening.
.MONDAY...West winds 5 to 10 knots, becoming southeast around 10
knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet.
Wave Detail: Northeast 3 feet at 13 seconds and southeast 2 feet
at 5 seconds. Intracoastal waters becoming a light chop. A chance
of showers and thunderstorms.
.MONDAY NIGHT...Southwest winds 5 to 10 knots, becoming northwest
after midnight. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet
at 13 seconds and southeast 2 feet at 5 seconds. Intracoastal
waters mostly smooth. A slight chance of showers and
thunderstorms in the evening.
.TUESDAY...Northwest winds 5 to 10 knots, becoming northeast
during the afternoon. Seas 2 to 3 feet. Intracoastal waters
mostly smooth. A slight chance of showers and thunderstorms.
.TUESDAY NIGHT AND WEDNESDAY...Northeast winds 10 to 15 knots.
Seas 2 to 3 feet. Intracoastal waters a light chop. A chance of
showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-240515-
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-
1012 AM EDT Sat Aug 23 2025

...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 4 PM EDT THIS
AFTERNOON...

.REST OF TODAY...West southwest winds 5 to 10 knots. Seas 4 to 6
feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at 13
seconds and southeast 2 feet at 6 seconds. Showers and
thunderstorms likely.
.TONIGHT...West southwest winds 10 to 15 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: Northeast 5 feet at 12
seconds and south 3 feet at 6 seconds. Showers and thunderstorms
likely, mainly in the evening.
.SUNDAY...West winds 10 to 15 knots, diminishing to 5 to 10 knots
in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave
Detail: Northeast 5 feet at 13 seconds and south 3 feet at 6
seconds. Showers and thunderstorms likely.
.SUNDAY NIGHT...West winds around 10 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 4 feet at 13
seconds and south 2 feet at 6 seconds. Showers and thunderstorms
likely.
.MONDAY...West winds 5 to 10 knots, becoming southwest in the
afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail:
Northeast 4 feet at 13 seconds and south 2 feet at 5 seconds. A
chance of showers and thunderstorms.
.MONDAY NIGHT...Southwest winds 5 to 10 knots, becoming west
after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave
Detail: Northeast 3 feet at 13 seconds and south 2 feet at
5 seconds. A chance of showers and thunderstorms, mainly in the
evening.
.TUESDAY...Northwest winds around 10 knots, becoming northeast
during the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. A
chance of showers and thunderstorms.
.TUESDAY NIGHT AND WEDNESDAY...Northeast winds 10 to 15 knots.
Seas 2 to 4 feet, occasionally to 5 feet. A chance of showers and
thunderstorms.

Winds and seas higher in and near thunderstorms.

$$