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coastal waters forecast for northeast florida/southeast georgia
national weather service jacksonville fl
227 pm edt wed mar 11 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.


amz450-452-454-120900-
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-
227 pm edt wed mar 11 2026

...small craft exercise caution in effect until 2 am edt
thursday...
...small craft advisory in effect from thursday afternoon through
friday morning...

.rest of today...southeast winds 15 to 20 knots. seas 2 to
4 feet, occasionally to 5 feet. wave detail: southeast 4 feet at
4 seconds and east 3 feet at 9 seconds. intracoastal waters
choppy. 
.tonight...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 4 feet at 5 seconds and east
2 feet at 9 seconds. intracoastal waters choppy. 
.thursday...southwest winds 10 to 15 knots, becoming northwest
20 to 25 knots in the afternoon. seas 3 to 4 feet, occasionally
to 5 feet. wave detail: southeast 4 feet at 9 seconds and south
3 feet at 6 seconds. intracoastal waters rough. a chance of
showers with a slight chance of thunderstorms. 
.thursday night...northeast winds 25 to 30 knots. seas 4 to
6 feet, occasionally to 8 feet, building to 6 to 8 feet,
occasionally to 10 feet after midnight. wave detail: northeast
6 feet at 8 seconds and north 5 feet at 5 seconds, becoming
northeast 8 feet at 7 seconds. intracoastal waters very rough. a
chance of showers, mainly in the evening. 
.friday...northeast winds 15 to 20 knots, diminishing to 5 to
10 knots in the afternoon. seas 5 to 7 feet, occasionally to
9 feet. wave detail: northeast 7 feet at 8 seconds. intracoastal
waters choppy. a slight chance of showers in the afternoon. 
.friday night...northeast winds 5 to 10 knots. seas 3 to 5 feet,
occasionally to 6 feet. wave detail: northeast 5 feet at
8 seconds. intracoastal waters light chop. a slight chance of
showers in the evening. 
.saturday...northeast winds 5 to 10 knots, becoming east. seas
2 to 4 feet, occasionally to 5 feet. intracoastal waters light
chop. a slight chance of showers. a slight chance of
thunderstorms in the evening, then a chance of showers and
thunderstorms after midnight. 
.sunday...south winds 10 to 15 knots. seas 2 to 4 feet,
occasionally to 5 feet. intracoastal waters a moderate chop. a
slight chance of thunderstorms in the morning. showers likely
through the day. a chance of thunderstorms through the night. a
chance of showers through the night. a slight chance of
thunderstorms after midnight. 

winds and waves higher in and near thunderstorms.

$$