922
FZUS52 KJAX 210024
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
824 PM EDT Mon Jul 20 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.

AMZ400-211530-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
824 PM EDT Mon Jul 20 2026

.SYNOPSIS...

Breezy southerly winds continue across the waters as a tropical
depression in the Gulf strengthens into a Tropical Storm later today
or tonight. The pressure gradient between the tropical system and
the Bermuda high will lead to a long duration of breezy south winds
to Exercise Caution level tonight. Southerly winds will increase
to Small Craft Advisory levels by Tuesday or Tuesday night. The
prolonged south winds will elevate seas up to 5 or possibly 6 feet
through Tuesday. For the second half of the week, winds will
decrease in strength as the tropical system moves farther west
along the northern Gulf coast. While winds decrease, a shift to
offshore flow will develop as a weak cold front approaches from
the northwest by the end of the week and then stalls just north of
the waters this weekend. Isolated strong thunderstorms with gusty
winds may impact the area waters later this afternoon and again
on Tuesday, mainly within 20 nm of the coast.


.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.


$$

AMZ450-452-454-211530-
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-
824 PM EDT Mon Jul 20 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 8 AM EDT
TUESDAY...
...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY AFTERNOON THROUGH
LATE TUESDAY NIGHT...

.REST OF TONIGHT...South winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: Southeast 4 feet at
6 seconds. Intracoastal waters choppy.
.TUESDAY...South winds 15 to 20 knots, becoming southeast 20 to
25 knots in the afternoon. Seas 3 to 4 feet, occasionally to
5 feet, building to 4 to 6 feet, occasionally to 8 feet in the
afternoon. Wave Detail: Southeast 4 feet at 6 seconds, becoming
southeast 6 feet at 6 seconds. Intracoastal waters rough.
.TUESDAY NIGHT...South winds 20 to 25 knots, diminishing to 15 to
20 knots after midnight. Seas 4 to 6 feet, occasionally to
8 feet. Wave Detail: Southeast 6 feet at 7 seconds. Intracoastal
waters rough.
.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 5 feet at 6 seconds. Intracoastal
waters choppy.
.WEDNESDAY NIGHT...South winds 15 to 20 knots, becoming southwest
10 to 15 knots after midnight. Seas 3 to 5 feet, occasionally to
6 feet. Wave Detail: Southeast 5 feet at 7 seconds. Intracoastal
waters choppy.
.THURSDAY AND THURSDAY NIGHT...Southwest winds 10 to 15 knots.
Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast
3 feet at 6 seconds. Intracoastal waters a moderate chop.
.FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
Intracoastal waters a moderate chop.
.SATURDAY...South 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.

$$

AMZ470-472-474-211530-
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-
824 PM EDT Mon Jul 20 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 8 AM EDT
TUESDAY...
...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY AFTERNOON THROUGH
LATE TUESDAY NIGHT...

.REST OF TONIGHT...South winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Southeast 5 feet at
6 seconds.
.TUESDAY...South winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: Southeast 5 feet at
6 seconds.
.TUESDAY NIGHT...South winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: Southeast 6 feet at
7 seconds.
.WEDNESDAY...South winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 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: Southeast 5 feet at 6 seconds.
.THURSDAY...Southwest 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.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas around 3 feet.
A slight chance of showers and thunderstorms in the evening.
.FRIDAY...South winds 5 to 10 knots, increasing to 10 to
15 knots. Seas 2 to 4 feet, occasionally to 5 feet.
.SATURDAY...South winds 5 to 10 knots, becoming southwest 10 to
15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A slight
chance of showers and thunderstorms.

Winds and seas higher in and near thunderstorms.

$$