451
FZUS52 KJAX 150631
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
231 AM EDT Sat Aug 15 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.

AMZ400-152100-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
231 AM EDT Sat Aug 15 2026

.SYNOPSIS...

Atlantic high pressure will build westward across the Florida
peninsula today, with light southwest to westerly winds this morning
shifting to southeasterly and becoming breezy this afternoon as the
Atlantic sea breeze pushes inland. Surface winds will then shift to
southerly this evening and back to southwesterly after midnight as
speeds diminish. Only isolated to widely scattered thunderstorms are
expected to develop this afternoon and evening, mainly for the
waters north of St. Augustine. The axis of Atlantic high pressure
will then shift southward on Sunday and Monday as a frontal boundary
pushes into the southeastern states, with this feature stalling just
north of the Georgia waters by midweek. Southwest to westerly winds
will prevail from Sunday through midweek, with evening wind surges
likely increasing speeds to Caution levels. Only isolated to widely
scattered afternoon and evening thunderstorms are expected on Sunday
and Monday, with coverage potentially increasing towards midweek as
the frontal boundary approaches from the north.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Aug 14, 2026 at 0000 UTC...

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

This data derived from NCEP Global RTOFS model.


$$

AMZ450-452-454-152100-
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-
231 AM EDT Sat Aug 15 2026

.REST OF TONIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet. Intracoastal waters light chop.
.SATURDAY...Southwest winds 5 to 10 knots, becoming southeast
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.
.SATURDAY NIGHT...South winds 10 to 15 knots, becoming southwest
5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail:
South 2 feet at 4 seconds. Intracoastal waters a moderate chop. A
slight chance of showers and thunderstorms in the evening.
.SUNDAY...Southwest winds 5 to 10 knots, becoming south in the
afternoon. Seas around 2 feet. Wave Detail: Southeast 2 feet at
5 seconds and southeast 2 feet at 8 seconds. Intracoastal waters
light chop. A slight chance of showers and thunderstorms in the
afternoon.
.SUNDAY NIGHT...Southwest winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: Southwest 2 feet at 4 seconds and southeast 2 feet
at 8 seconds. Intracoastal waters a moderate chop. A slight
chance of showers in the evening.
.MONDAY...West winds 10 to 15 knots, becoming southwest 5 to
10 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: West
2 feet at 3 seconds and southeast 2 feet at 8 seconds.
Intracoastal waters a moderate chop. A slight chance of showers
and thunderstorms in the afternoon.
.MONDAY NIGHT...Southwest winds 10 to 15 knots. Seas 2 to 3 feet.
Intracoastal waters a moderate chop.
.TUESDAY THROUGH WEDNESDAY...Southwest winds 10 to 15 knots. Seas
2 to 3 feet. Intracoastal waters a moderate chop. A slight chance
of showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-152100-
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-
231 AM EDT Sat Aug 15 2026

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

Winds and seas higher in and near thunderstorms.

$$