865
FZUS52 KJAX 170626
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
226 AM EDT Thu Sep 17 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.

AMZ400-172100-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
226 AM EDT Thu Sep 17 2026

.SYNOPSIS...

Breezy northeast winds and elevated seas gradually subside this
morning as high pressure ridging builds down the eastern seaboard.
Small Craft Advisory conditions decrease to small craft exercise
caution today. Rounds of isolated showers will move over the area
waters today. Another area of high pressure builds across the
eastern seaboard continuing onshore flow into early next week. An
upper disturbance moving over Florida and into the Gulf will bring
scattered to numerous showers and storms over the waters Friday into
the weekend.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Sep 16, 2026 at 0000 UTC...

 54 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.


$$

AMZ450-172100-
Coastal waters from Altamaha Sound to Fernandina Beach FL out
20 NM-
226 AM EDT Thu Sep 17 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH THIS EVENING...

.REST OF TONIGHT...Northeast winds 15 to 20 knots. Seas 4 to
6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at
7 seconds. Intracoastal waters choppy.
.THURSDAY...Northeast winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds.
Intracoastal waters choppy.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to
5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at
7 seconds. Intracoastal waters a moderate chop.
.FRIDAY...Northeast winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: East
3 feet at 7 seconds. Intracoastal waters a moderate chop.
.FRIDAY NIGHT...East winds around 5 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 7 seconds. Intracoastal waters smooth.
.SATURDAY...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 6 seconds. Intracoastal waters light chop.
A slight chance of showers. A slight chance of thunderstorms in
the afternoon.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet.
Intracoastal waters light chop. A slight chance of showers and
thunderstorms in the evening, then a chance of showers and
thunderstorms after midnight.
.SUNDAY THROUGH MONDAY...Southeast winds 5 to 10 knots. Seas
around 2 feet. Intracoastal waters light chop. Showers likely
with a chance of thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

AMZ452-454-172100-
Coastal waters from Fernandina Beach to St. Augustine FL out
20 NM-
Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-
226 AM EDT Thu Sep 17 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TONIGHT...Northeast winds 15 to 20 knots. Seas 5 to
7 feet, occasionally to 9 feet. Wave Detail: Northeast 6 feet at
7 seconds. Intracoastal waters choppy. A slight chance of
showers.
.THURSDAY...Northeast winds 15 to 20 knots. Seas 5 to 6 feet,
occasionally to 8 feet. Wave Detail: Northeast 6 feet at
7 seconds. Intracoastal waters choppy. A slight chance of
showers.
.THURSDAY NIGHT...Northeast winds 15 to 20 knots, diminishing to
10 to 15 knots after midnight. Seas 4 to 5 feet, occasionally to
6 feet. Wave Detail: Northeast 5 feet at 7 seconds. Intracoastal
waters choppy. A slight chance of showers.
.FRIDAY...Northeast winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 4 feet at
7 seconds. Intracoastal waters a moderate chop. A slight chance
of showers and thunderstorms.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds.
Intracoastal waters light chop. A slight chance of thunderstorms
in the evening. A slight chance of showers.
.SATURDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 7 seconds. Intracoastal waters light chop.
A slight chance of thunderstorms. A chance of showers, mainly in
the morning.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet.
Intracoastal waters light chop. A slight chance of showers and
thunderstorms in the evening, then a chance of showers and
thunderstorms after midnight.
.SUNDAY THROUGH MONDAY...Southeast winds 5 to 10 knots. Seas 2 to
3 feet. Intracoastal waters light chop. Showers likely with a
chance of thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

AMZ472-474-172100-
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-
226 AM EDT Thu Sep 17 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TONIGHT...Northeast winds 15 to 20 knots. Seas 6 to
7 feet, occasionally to 9 feet. Wave Detail: Northeast 6 feet at
7 seconds. A slight chance of showers.
.THURSDAY...Northeast winds 15 to 20 knots. Seas around 6 feet,
occasionally to 8 feet. Wave Detail: Northeast 6 feet at
7 seconds. A slight chance of showers.
.THURSDAY NIGHT...Northeast winds 15 to 20 knots, diminishing to
10 to 15 knots after midnight. Seas 4 to 6 feet, occasionally to
8 feet. Wave Detail: Northeast 6 feet at 7 seconds. A slight
chance of showers.
.FRIDAY...Northeast winds 10 to 15 knots. Seas around 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 4 feet at
7 seconds. A chance of showers with a slight chance of
thunderstorms.
.FRIDAY NIGHT AND SATURDAY...East winds 5 to 10 knots. Seas 3 to
4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at
7 seconds. A chance of showers and thunderstorms.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: East 3 feet at 7 seconds. A chance of thunderstorms.
A chance of showers in the evening, then showers likely after
midnight.
.SUNDAY THROUGH MONDAY...Southeast winds 5 to 10 knots. Seas 2 to
3 feet. Showers likely with a chance of thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

AMZ470-172100-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
226 AM EDT Thu Sep 17 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT THROUGH THIS EVENING...

.REST OF TONIGHT...Northeast winds 15 to 20 knots. Seas 5 to
7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at
7 seconds.
.THURSDAY...Northeast winds 15 to 20 knots. Seas 5 to 6 feet,
occasionally to 8 feet. Wave Detail: East 6 feet at 7 seconds.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots. Seas 4 to
5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at
7 seconds.
.FRIDAY...Northeast winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. A
slight chance of showers in the morning.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 7 seconds. A slight chance of showers
after midnight.
.SATURDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 7 seconds. A slight chance of showers and
thunderstorms.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms in the evening, then a
chance of showers and thunderstorms after midnight.
.SUNDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. A chance of
thunderstorms in the morning. A chance of showers through the
day. A slight chance of thunderstorms through the night. A slight
chance of showers in the evening, then a chance of showers and
thunderstorms after midnight.
.MONDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. A chance of
thunderstorms.

Winds and seas higher in and near thunderstorms.

$$