520
FZUS52 KJAX 130829
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
429 AM EDT Thu Aug 13 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.

AMZ400-132345-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
429 AM EDT Thu Aug 13 2026

.SYNOPSIS...

A trough of low pressure will develop over the southeast states
through the weekend while a high pressure ridge remains positioned
over the eastern Gulf and central Florida. This will result in
westerly winds during the next several days, with the sea breeze
shifting winds to southeast or south over the near shore waters
each afternoon, followed by south evening wind surges that may
briefly increase speeds to near caution levels before subsiding
after midnight. Stronger offshore flow may develop Monday and
Tuesday next week. Isolated to scattered mainly afternoon and
evening thunderstorms will remain possible each day through the
upcoming weekend, and some of the storms will be capable of
producing strong gusty winds and locally high seas.

.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.

$$

AMZ450-452-454-132345-
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-
429 AM EDT Thu Aug 13 2026

.TODAY...West winds 5 to 10 knots, becoming south this afternoon.
Seas around 2 feet. Intracoastal waters light chop.
.TONIGHT...Southwest winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 3 seconds. 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: South
2 feet at 3 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...Southwest winds 5 to 10 knots, becoming south in the
afternoon. Seas around 2 feet. Wave Detail: Southeast 2 feet at
4 seconds. Intracoastal waters light chop. A slight chance of
showers and thunderstorms in the afternoon.
.SATURDAY NIGHT...South winds 5 to 10 knots, becoming southwest
after midnight. Seas around 2 feet. Wave Detail: Southeast 2 feet
at 4 seconds. Intracoastal waters light chop.
.SUNDAY...South winds 5 to 10 knots, becoming southwest. Seas
around 2 feet. Intracoastal waters light chop. A slight chance of
showers and thunderstorms in the afternoon.
.MONDAY...Southwest winds 5 to 10 knots. Seas 2 to 3 feet.
Intracoastal waters light chop.

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-132345-
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-
429 AM EDT Thu Aug 13 2026

.TODAY...West winds 5 to 10 knots, becoming southwest this
afternoon. Seas around 2 feet. Wave Detail: West 2 feet at
3 seconds.
.TONIGHT...Southwest winds around 10 knots. Seas around 2 feet.
Wave Detail: Southwest 2 feet at 3 seconds.
.FRIDAY...Southwest winds 5 to 10 knots, becoming south 10 to
15 knots in the afternoon. Seas around 2 feet. Wave Detail:
Southwest 2 feet at 3 seconds.
.FRIDAY NIGHT...Southwest winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: South 2 feet at 4 seconds.
.SATURDAY AND SATURDAY NIGHT...Southwest winds 10 to 15 knots.
Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds.
.SUNDAY THROUGH MONDAY...Southwest winds 10 to 15 knots. Seas
2 to 3 feet. Wave Detail: South 2 feet at 4 seconds.

$$