487
FZUS52 KJAX 122326
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
726 PM EDT Wed Aug 12 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.

AMZ400-131430-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
726 PM EDT Wed Aug 12 2026

.SYNOPSIS...

High pressure positioned over the eastern Gulf will weaken on
Thursday as troughing develops over the southeastern states.
Westerly winds will prevail during the next several days, with the
sea breeze shifting winds to southeasterly or southerly over the
near shore waters each afternoon, followed by southerly evening wind
surges that may briefly increase speeds to near caution levels
before subsiding after midnight. Scattered mainly afternoon and
evening thunderstorms will remain possible each day through the
upcoming weekend.


.GULF STREAM...

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

 42 nautical miles east of Flagler Beach.
 49 nautical miles east of Saint Augustine Beach.
 64 nautical miles east southeast of Jacksonville Beach.
 71 nautical miles east southeast of St Simons Island.

This data derived from NCEP Global RTOFS model.


$$

AMZ450-452-454-131430-
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-
726 PM EDT Wed Aug 12 2026

.REST OF TONIGHT...West winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: West 2 feet at 3 seconds. Intracoastal waters a
moderate chop. A chance of showers with a slight chance of
thunderstorms early, then a slight chance of showers and
thunderstorms this evening.
.THURSDAY...West winds 5 to 10 knots, becoming south in the
afternoon. Seas around 2 feet. Intracoastal waters light chop. A
slight chance of showers and thunderstorms in the afternoon.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet. Intracoastal waters light chop.
.FRIDAY...Southwest winds 5 to 10 knots, becoming south 10 to
15 knots in the afternoon. Seas around 2 feet. Wave Detail:
Southeast 2 feet at 4 seconds. Intracoastal waters a moderate
chop. A slight chance of showers and thunderstorms in the
afternoon.
.FRIDAY NIGHT...South winds 10 to 15 knots, becoming southwest
5 to 10 knots after midnight. Seas around 2 feet. Wave Detail:
South 2 feet at 4 seconds. Intracoastal waters a moderate chop.
.SATURDAY AND SATURDAY NIGHT...Southwest winds 10 to 15 knots.
Seas around 2 feet. Wave Detail: Southeast 2 feet at 4 seconds.
Intracoastal waters a moderate chop.
.SUNDAY THROUGH MONDAY...Southwest winds 5 to 10 knots. Seas 2 to
3 feet. Intracoastal waters light chop.

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-131430-
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-
726 PM EDT Wed Aug 12 2026

.REST OF TONIGHT...West winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: West 2 feet at 3 seconds. A chance of showers and
thunderstorms early, then a slight chance of showers and
thunderstorms this evening.
.THURSDAY...West winds 5 to 10 knots, becoming southwest in the
afternoon. Seas around 2 feet. Wave Detail: West 2 feet at
4 seconds.
.THURSDAY NIGHT...Southwest winds around 10 knots. Seas around
2 feet. Wave Detail: South 2 feet at 3 seconds.
.FRIDAY...Southwest winds 5 to 10 knots, becoming south in the
afternoon. Seas around 2 feet. Wave Detail: Southwest 2 feet at
3 seconds.
.FRIDAY NIGHT THROUGH SATURDAY NIGHT...Southwest winds 10 to
15 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at
4 seconds and southeast 2 feet at 9 seconds.
.SUNDAY THROUGH MONDAY...Southwest winds 10 to 15 knots. Seas
2 to 3 feet. Wave Detail: Southeast 3 feet at 8 seconds and south
2 feet at 4 seconds.

Winds and seas higher in and near thunderstorms.

$$