765
FZUS52 KJAX 212341
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
741 PM EDT Thu Aug 21 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.

AMZ400-221445-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
741 PM EDT Thu Aug 21 2025

.SYNOPSIS...

Lingering swells from Hurricane Erin will continue to subside
across area waters through tonight. A surface trough will shift
southward toward the local waters late tonight and then linger
across the local waters through the weekend brining an increase in
shower and thunderstorm activity. A daily sea breeze through the
weekend will result in a shift in the flow each afternoon through
Friday, though southwesterly offshore flow will be more dominant
this weekend.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Aug 19, 2025 at 1200 UTC...

 51 nautical miles east of Flagler Beach.
 59 nautical miles east of Saint Augustine Beach.
 68 nautical miles east of Jacksonville Beach.
 81 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.


$$

AMZ450-452-454-221445-
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-
741 PM EDT Thu Aug 21 2025

...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH FRIDAY
MORNING...

.TONIGHT...Southwest winds 5 to 10 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: East 6 feet at 13 seconds
and southeast 2 feet at 7 seconds. Intracoastal waters light
chop. A chance of showers with a slight chance of thunderstorms.
.FRIDAY...Southwest winds 5 to 10 knots, becoming southeast in
the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave
Detail: East 5 feet at 12 seconds and southeast 2 feet at
6 seconds. Intracoastal waters light chop. A chance of showers
and thunderstorms in the morning, then showers and thunderstorms
in the afternoon.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 4 feet at
12 seconds and southeast 2 feet at 6 seconds. Intracoastal waters
light chop. Showers with thunderstorms likely in the evening,
then showers likely with a chance of thunderstorms after
midnight.
.SATURDAY...West winds 5 to 10 knots, becoming southeast in the
afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail:
Northeast 4 feet at 13 seconds and southeast 2 feet at 6 seconds.
Intracoastal waters light chop. Showers likely with a chance of
thunderstorms in the morning, then showers with thunderstorms
likely in the afternoon.
.SATURDAY NIGHT...West 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
light 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...West 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
light chop. A chance of showers and thunderstorms in the morning,
then showers with thunderstorms likely in the afternoon.
.SUNDAY NIGHT...West winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Intracoastal waters light chop. A chance
of showers. A chance of thunderstorms, mainly in the evening.
.MONDAY THROUGH TUESDAY...South winds 5 to 10 knots. Seas 2 to
4 feet, occasionally to 5 feet. Intracoastal waters light chop. A
chance of showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-221445-
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-
741 PM EDT Thu Aug 21 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY MORNING...

.TONIGHT...Southwest winds 5 to 10 knots. Seas 5 to 8 feet,
occasionally to 10 feet. Wave Detail: East 7 feet at 12 seconds
and southeast 3 feet at 6 seconds. A chance of showers. A slight
chance of thunderstorms this evening, then a chance of
thunderstorms after midnight.
.FRIDAY...West winds 5 to 10 knots, becoming southeast in the
afternoon. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail:
Northeast 6 feet at 12 seconds and southeast 3 feet at 6 seconds.
A chance of showers and thunderstorms in the morning, then
showers and thunderstorms likely in the afternoon.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Seas 5 to 7 feet,
occasionally to 9 feet. Wave Detail: Northeast 5 feet at
12 seconds and southeast 3 feet at 6 seconds. Showers.
Thunderstorms likely, mainly in the evening.
.SATURDAY...Southwest winds 5 to 10 knots, becoming south in the
afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail:
Northeast 5 feet at 13 seconds and southeast 3 feet at 6 seconds.
Showers with a chance of thunderstorms.
.SATURDAY NIGHT AND SUNDAY...West 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 with a
chance of thunderstorms.
.SUNDAY NIGHT...West winds 5 to 10 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 4 feet at
14 seconds and southeast 2 feet at 6 seconds. Showers likely with
a chance of thunderstorms.
.MONDAY THROUGH TUESDAY...South winds 5 to 10 knots. Seas 3 to
5 feet, occasionally to 6 feet. A chance of showers and
thunderstorms.

Winds and seas higher in and near thunderstorms.

$$