175
FZUS52 KJAX 171825
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
225 PM 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.

AMZ400-180900-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
225 PM EDT Thu Sep 17 2026

.SYNOPSIS...

Rounds of isolated showers will move over the area waters today as
high pressure ridge weakens. Another area of high pressure builds
across the eastern seaboard this weekend, 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 17, 2026...

 The Gulf Stream data is unavailable.

This data derived from NCEP Global RTOFS model.


$$

AMZ450-180900-
Coastal waters from Altamaha Sound to Fernandina Beach FL out
20 NM-
225 PM EDT Thu Sep 17 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

.REST OF TODAY...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.
.TONIGHT...Northeast winds 10 to 15 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East 4 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...Northeast winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: East 2 feet at 6 seconds. Intracoastal waters light
chop.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: East 2 feet at 7 seconds. Intracoastal waters light
chop. A chance of showers and thunderstorms after midnight.
.SUNDAY...East winds 5 to 10 knots. Seas around 2 feet.
Intracoastal waters light chop. A chance of showers and
thunderstorms in the morning, then a slight chance of showers and
thunderstorms in the afternoon. A chance of showers and
thunderstorms through the night.
.MONDAY...East winds 5 to 10 knots. Seas around 2 feet.
Intracoastal waters light chop. Showers likely with a slight
chance of thunderstorms in the morning, then a chance of showers
and thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

AMZ452-454-180900-
Coastal waters from Fernandina Beach to St. Augustine FL out
20 NM-
Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-
225 PM EDT Thu Sep 17 2026

.REST OF TODAY...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.
.TONIGHT...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 in the morning.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 3 feet at 7 seconds.
Intracoastal waters light chop. A slight chance of showers after
midnight.
.SATURDAY AND SATURDAY NIGHT...East winds 5 to 10 knots. Seas
2 to 3 feet. Wave Detail: East 3 feet at 7 seconds. Intracoastal
waters light chop. A chance of showers and thunderstorms.
.SUNDAY...Northeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 8 seconds and east 2 feet at 9 seconds.
Intracoastal waters light chop. A chance of thunderstorms.
Showers likely, mainly in the morning.
.MONDAY...Northeast winds 5 to 10 knots, becoming east. Seas
around 2 feet. Intracoastal waters light chop. A chance of
showers.

Winds and waves higher in and near thunderstorms.

$$

AMZ472-474-180900-
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-
225 PM EDT Thu Sep 17 2026

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

$$

AMZ470-180900-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
225 PM EDT Thu Sep 17 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

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

Winds and seas higher in and near thunderstorms.

$$