035
FZUS52 KJAX 211221
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
821 AM EDT Tue Jul 21 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.

AMZ400-220330-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
821 AM EDT Tue Jul 21 2026

.SYNOPSIS...

Breezy southerly winds between the Tropical Storm Bertha and the
Bermuda high will lead a couple more days of breezy conditions.
Winds will increase to Small Craft Advisory levels this afternoon
and remain elevated through early Wednesday. Seas will rise toward
5 or possibly 6 feet today in response to the winds. Relaxing
winds are expected Wednesday night as flow generally trends
offshore as a weak cold front approaches from the northwest. The
front is likely to stalls north of the waters this weekend as
waves of low pressure track along it. Though offshore flow will be
in place from Thursday onward, afternoon winds in nearshore
waters will be driven by the coastal sea breeze development each
afternoon.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Jul 20, 2026 at 0000 UTC...

 46 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.


$$

AMZ450-452-454-220330-
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-
821 AM EDT Tue Jul 21 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON
THROUGH LATE TONIGHT...

.REST OF TODAY...South winds 20 to 25 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: Southeast 5 feet at 6
seconds. Intracoastal waters choppy. A slight chance of showers
and thunderstorms this afternoon.
.TONIGHT...South winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: Southeast 5 feet at
7 seconds. Intracoastal waters choppy. A slight chance of showers
and thunderstorms in the evening.
.WEDNESDAY...South winds 10 to 15 knots, becoming southeast 15 to
20 knots in the afternoon. Seas 3 to 5 feet, occasionally to
6 feet. Wave Detail: Southeast 4 feet at 6 seconds. Intracoastal
waters choppy.
.WEDNESDAY NIGHT...South winds 15 to 20 knots, diminishing to
10 to 15 knots after midnight. Seas 3 to 5 feet, occasionally to
6 feet. Wave Detail: Southeast 5 feet at 6 seconds. Intracoastal
waters choppy.
.THURSDAY...South winds 5 to 10 knots, becoming southeast 10 to
15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail:
Southeast 3 feet at 7 seconds. Intracoastal waters a moderate
chop.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: Southeast 3 feet at 5 seconds and east 2 feet at
8 seconds. Intracoastal waters a moderate chop.
.FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
Intracoastal waters a moderate chop.
.SATURDAY...Southwest winds 10 to 15 knots. Seas 2 to 3 feet.
Intracoastal waters a moderate chop. A slight chance of showers
and thunderstorms through the night. A chance of showers with a
slight chance of thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-220330-
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-
821 AM EDT Tue Jul 21 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON
THROUGH LATE TONIGHT...

.REST OF TODAY...South winds 20 to 25 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Southeast 5 feet at 6
seconds.
.TONIGHT...South winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Southeast 5 feet at
7 seconds.
.WEDNESDAY...South winds 10 to 15 knots, increasing to 15 to
20 knots in the afternoon. Seas 3 to 4 feet, occasionally to
5 feet. Wave Detail: Southeast 4 feet at 7 seconds.
.WEDNESDAY NIGHT...South winds 15 to 20 knots, diminishing to
10 to 15 knots after midnight. Seas 3 to 5 feet, occasionally to
6 feet. Wave Detail: South 4 feet at 5 seconds and east 2 feet at
8 seconds.
.THURSDAY AND THURSDAY NIGHT...South winds 10 to 15 knots. Seas
2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds.
.FRIDAY...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 8 seconds.
.SATURDAY...Southwest winds 5 to 10 knots, increasing to 10 to
15 knots. Seas around 3 feet. A slight chance of showers and
thunderstorms.

Winds and seas higher in and near thunderstorms.

$$