593
FZUS52 KJAX 150914
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
514 AM EDT Tue Sep 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.

AMZ400-160015-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
514 AM EDT Tue Sep 15 2026

.SYNOPSIS...

Northeast winds will strengthen and seas will build across area
waters today through Thursday as a cool front moves through the area
and high pressure ridge builds north of the area. This will result
in small craft advisory conditions, rough seas, and waves of
scattered to numerous showers and a few thunderstorms over the
area waters through much of the week. Occasional wind gusts may be
near gale force later today through late Wednesday evening.
Improving conditions are expected by Friday as onshore winds
weaken and seas gradually lower.

.GULF STREAM...

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

 50 nautical miles east of Flagler Beach.
 58 nautical miles east of Saint Augustine Beach.
 70 nautical miles east southeast of Jacksonville Beach.
 71 nautical miles east southeast of St Simons Island.

This data derived from NCEP Global RTOFS model.

$$

AMZ452-472-160015-
Coastal waters from Fernandina Beach to St. Augustine FL out
20 NM-
Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-
514 AM EDT Tue Sep 15 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM EDT THIS AFTERNOON
THROUGH LATE WEDNESDAY NIGHT...

.TODAY...Northeast winds 15 to 20 knots, becoming east 20 to 25
knots with occasional gusts up to 35 knots this afternoon. Seas 2
to 4 feet, occasionally to 5 feet, building to 4 to 6 feet,
occasionally to 8 feet this afternoon. Wave Detail: East 3 feet at
4 seconds and east 2 feet at 9 seconds, becoming northeast 6 feet
at 9 seconds and east 5 feet at 5 seconds. Intracoastal waters
rough. Showers likely. A slight chance of thunderstorms this
morning, then a chance of thunderstorms this afternoon.
.TONIGHT...Northeast winds 20 to 25 knots. Occasional gusts up to
35 knots in the evening. Seas 6 to 7 feet, occasionally to 9
feet. Wave Detail: East 7 feet at 6 seconds. Intracoastal waters
rough. A chance of showers and thunderstorms in the evening.
.WEDNESDAY...Northeast winds 20 to 25 knots. Seas 6 to 7 feet,
occasionally to 9 feet. Wave Detail: Northeast 7 feet at
8 seconds. Intracoastal waters rough. A slight chance of showers
in the morning, then a chance of showers in the afternoon.
.WEDNESDAY NIGHT...Northeast winds 20 to 25 knots. Seas 6 to
7 feet, occasionally to 9 feet. Wave Detail: Northeast 7 feet at
7 seconds. Intracoastal waters rough. A slight chance of showers
and thunderstorms in the evening.
.THURSDAY AND THURSDAY NIGHT...Northeast winds 15 to 20 knots.
Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast
6 feet at 8 seconds. Intracoastal waters choppy. A chance of
showers and thunderstorms.
.FRIDAY...Northeast winds 10 to 15 knots, becoming east 5 to
10 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail:
East 5 feet at 8 seconds. Intracoastal waters a moderate chop. A
chance of showers and thunderstorms.
.SATURDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
Intracoastal waters light chop. A chance of thunderstorms.
Showers likely, mainly in the morning.

Winds and waves higher in and near thunderstorms.

$$

AMZ454-474-160015-
Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-
Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM-
514 AM EDT Tue Sep 15 2026

...SMALL CRAFT EXERCISE CAUTION TODAY...
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
WEDNESDAY NIGHT...

.TODAY...Northeast winds 10 to 15 knots, becoming east 15 to
20 knots this afternoon. Seas 2 to 3 feet, building to 3 to
5 feet, occasionally to 6 feet this afternoon. Wave Detail: East
3 feet at 4 seconds and east 2 feet at 9 seconds, becoming east
5 feet at 5 seconds and east 2 feet at 9 seconds. Intracoastal
waters choppy. Showers likely with a chance of thunderstorms.
.TONIGHT...East winds 20 to 25 knots. Seas 5 to 7 feet,
occasionally to 9 feet. Wave Detail: East 7 feet at 6 seconds.
Intracoastal waters rough. Showers likely with a chance of
thunderstorms in the evening, then a slight chance of showers
after midnight.
.WEDNESDAY...Northeast winds 20 to 25 knots. Seas 6 to 7 feet,
occasionally to 9 feet. Wave Detail: Northeast 7 feet at
8 seconds. Intracoastal waters rough. A slight chance of showers
in the morning, then a chance of showers with a slight chance of
thunderstorms in the afternoon.
.WEDNESDAY NIGHT...Northeast winds 20 to 25 knots. Seas 6 to
8 feet, occasionally to 10 feet. Wave Detail: Northeast 7 feet at
7 seconds. Intracoastal waters rough. A slight chance of
thunderstorms. A chance of showers, mainly in the evening.
.THURSDAY AND THURSDAY NIGHT...Northeast winds 15 to 20 knots.
Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast
6 feet at 8 seconds. Intracoastal waters choppy. A chance of
showers and thunderstorms.
.FRIDAY THROUGH SATURDAY...Southeast winds 5 to 10 knots. Seas
2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast
4 feet at 8 seconds and southeast 2 feet at 7 seconds.
Intracoastal waters light chop. Showers likely with a chance of
thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

AMZ450-470-160015-
Coastal waters from Altamaha Sound to Fernandina Beach FL out
20 NM-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
514 AM EDT Tue Sep 15 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM EDT THIS MORNING
THROUGH LATE WEDNESDAY NIGHT...

.TODAY...Northeast winds 15 to 20 knots, becoming east 20 to
25 knots with occasional gusts up to 35 knots this afternoon.
Seas 2 to 4 feet, occasionally to 5 feet, building to 5 to 7 feet,
occasionally to 9 feet this afternoon. Wave Detail: East 4 feet
at 4 seconds and east 2 feet at 9 seconds, becoming east 7 feet at
9 seconds and east 6 feet at 5 seconds. Intracoastal waters
rough. A chance of showers with a slight chance of thunderstorms
this morning, then showers likely with a chance of thunderstorms
this afternoon.
.TONIGHT...Northeast winds 20 to 25 knots. Occasional gusts up to
35 knots in the evening. Seas 6 to 8 feet, occasionally to 10
feet. Wave Detail: East 8 feet at 7 seconds and east 2 feet at 4
seconds. Intracoastal waters rough. A slight chance of showers and
thunderstorms in the evening.
.WEDNESDAY...Northeast winds 15 to 20 knots, increasing to 20 to
25 knots in the afternoon. Seas 5 to 7 feet, occasionally to
9 feet. Wave Detail: Northeast 7 feet at 8 seconds. Intracoastal
waters rough. A chance of showers, mainly in the morning.
.WEDNESDAY NIGHT...Northeast winds 20 to 25 knots, diminishing to
15 to 20 knots after midnight. Seas 5 to 7 feet, occasionally to
9 feet. Wave Detail: East 7 feet at 7 seconds. Intracoastal
waters rough.
.THURSDAY AND THURSDAY NIGHT...Northeast winds 15 to 20 knots.
Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East
6 feet at 8 seconds. Intracoastal waters choppy. A slight chance
of showers and thunderstorms.
.FRIDAY...Northeast winds 10 to 15 knots, becoming east 5 to
10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
East 4 feet at 7 seconds. Intracoastal waters a moderate chop. A
chance of showers and thunderstorms.
.SATURDAY...East winds 5 to 10 knots. Seas 2 to 3 feet.
Intracoastal waters light chop. A chance of thunderstorms.

Winds and waves higher in and near thunderstorms.

$$