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coastal waters forecast for northeast florida/southeast georgia
national weather service jacksonville fl
239 pm edt thu mar 12 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.


amz450-452-130945-
coastal waters from altamaha sound to fernandina beach fl out
20 nm-
coastal waters from fernandina beach to st. augustine fl out
20 nm-
239 pm edt thu mar 12 2026

...small craft advisory in effect until 7 pm edt this evening...
...gale warning in effect from 7 pm edt this evening through late
tonight...

.rest of today...northwest winds 20 to 25 knots. seas 3 to
4 feet, occasionally to 5 feet. wave detail: west 3 feet at
4 seconds and southeast 3 feet at 9 seconds. intracoastal waters
rough. showers with a slight chance of thunderstorms. 
.tonight...northeast winds 25 to 35 knots. seas 5 to 8 feet,
occasionally to 10 feet. wave detail: northeast 8 feet at
7 seconds and north 5 feet at 4 seconds. intracoastal waters
extremely rough. 
.friday...east winds 15 to 20 knots, becoming northeast 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. 
.friday night...northeast winds around 5 knots. seas 3 to 5 feet,
occasionally to 6 feet. wave detail: east 5 feet at 8 seconds.
intracoastal waters smooth. 
.saturday...northeast winds 5 to 10 knots. seas 3 to 4 feet,
occasionally to 5 feet. wave detail: east 4 feet at 8 seconds.
intracoastal waters light chop. 
.saturday night...east winds 5 to 10 knots. seas 2 to 4 feet,
occasionally to 5 feet. wave detail: east 3 feet at 8 seconds.
intracoastal waters light chop. a slight chance of showers and
thunderstorms in the evening, then a chance of showers and
thunderstorms after midnight. 
.sunday...southeast winds 10 to 15 knots, becoming south 15 to
20 knots. seas 3 to 5 feet, occasionally to 6 feet. intracoastal
waters choppy. a slight chance of thunderstorms in the morning.
showers. a chance of thunderstorms through the night, then a
slight chance of thunderstorms after midnight. 
.monday...southwest winds 20 to 25 knots, becoming northwest
25 to 30 knots. seas 5 to 7 feet, occasionally to 9 feet.
intracoastal waters very rough. a slight chance of thunderstorms
in the morning. showers likely through the day. a chance of
thunderstorms in the afternoon, then a chance of showers with a
slight chance of thunderstorms in the evening. 

winds and waves higher in and near thunderstorms.

$$