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coastal waters forecast for northeast florida/southeast georgia
national weather service jacksonville fl
957 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.


amz450-452-454-121700-
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-
957 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 tonight...south winds 15 to 20 knots, becoming south
southwest and diminishing to 10 to 15 knots late. 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 becoming
a light chop.
.thursday...southwest winds around 15 knots, becoming northwest 
and increasing to 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
becoming rough. showers and thunderstorms likely, mainly during 
the afternoon. a few strong storms are possible, with frequent 
lightning strikes and briefly gusty winds.
.thursday night...north winds 25 to 30 knots, becoming northeast
after midnight. occasional gusts to gale force are possible. 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 early in the evening. 
.friday...northeast winds around 20 knots, diminishing to 10 to 15 
knots in the afternoon. seas 5 to 7 feet, occasionally to 9 feet. 
wave detail: northeast 7 feet at 8 seconds. intracoastal waters 
becoming a light chop. a slight chance of showers during the
afternoon.
.friday night and saturday...east northeast winds 5 to 10 knots,
increasing to 10 to 15 knots during the afternoon. seas 3 to 5 
feet, occasionally to 6 feet. wave detail: northeast 5 feet at 8 
seconds. intracoastal waters a light chop. a slight chance of 
showers. 
.saturday night...east southeast winds around 10 knots. seas 2 to
4 feet, occasionally to 5 feet. wave detail: east 4 feet at 8 
seconds. intracoastal waters a light chop. a slight chance of 
showers and thunderstorms in the evening, then a chance of showers
and thunderstorms after midnight. 
.sunday...south southeast winds 10 to 15 knots. seas 2 to 4 feet,
occasionally to 5 feet. intracoastal waters a light chop. showers
likely with a chance of thunderstorms.
.sunday night and monday...south winds 15 to 20 knots, becoming 
southwest around 15 knots during the afternoon. seas 3 to 4 feet,
occasionally to 5 feet. intracoastal waters a moderate chop. 
showers and thunderstorms likely.

winds and waves higher in and near thunderstorms.

$$