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coastal waters forecast for northeast florida/southeast georgia
national weather service jacksonville fl
922 pm edt sat sep 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.


amz450-452-454-131630-
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-
922 pm edt sat sep 12 2026

.rest of tonight...southwest winds 10 to 15 knots, becoming west 
5 to 10 knots after midnight. seas 2 to 3 feet. wave detail: 
southeast 2 feet at 4 seconds and east 2 feet at 8 seconds.
intracoastal waters becoming mostly smooth. 
.sunday...west northwest winds around 10 knots, becoming 
east northeast 10 to 15 knots in the afternoon. seas around 2 
feet. wave detail: south 2 feet at 4 seconds and east 2 feet at 8
seconds. intracoastal waters a light chop. a chance of showers 
and thunderstorms in the afternoon. a few strong storms will be
possible late in the afternoon, with strong wind gusts, frequent
lightning strikes, and torrential downpours.
.sunday night...south winds 10 to 15 knots, becoming west 5 to
10 knots after midnight. seas 2 to 3 feet. wave detail: southeast
3 feet at 9 seconds and southeast 2 feet at 4 seconds.
intracoastal waters becoming mostly smooth. a chance of showers 
and thunderstorms in the evening. 
.monday...northwest winds 5 to 10 knots, becoming east northeast
around 10 knots in the afternoon. seas around 2 feet. wave 
detail: southeast 2 feet at 9 seconds. intracoastal waters
becoming a light chop. a slight chance of showers and
thunderstorms late in the afternoon. 
.monday night...southeast winds around 5 knots, becoming northeast
around 10 knots after midnight. seas around 2 feet. wave detail: 
east 2 feet at 9 seconds. intracoastal waters mostly smooth. 
.tuesday...northeast winds 15 to 20 knots, increasing to 20 to 25
knots in the afternoon. seas 2 to 3 feet, building to 4 to 6 feet,
occasionally to 8 feet in the afternoon. wave detail:
northeast 3 feet at 7 seconds and east 2 feet at 9 seconds,
becoming northeast 6 feet at 5 seconds and east 2 feet at 9
seconds. intracoastal waters becoming rough. a chance of showers 
with a slight chance of thunderstorms in the morning, then showers
likely with a chance of thunderstorms in the afternoon. 
.tuesday night...northeast winds 20 to 25 knots. seas 6 to 8 
feet, occasionally to 10 feet. intracoastal waters rough. a 
chance of showers with a slight chance of thunderstorms. 
.wednesday...northeast winds 20 to 25 knots. seas 6 to 9 feet, 
occasionally to 11 feet. intracoastal waters rough. a chance of 
showers. and thunderstorms after midnight. 
.wednesday night and thursday...northeast winds around 20 knots, 
becoming east 15 to 20 knots during the afternoon. seas 5 to 7 
feet, occasionally to 9 feet. intracoastal waters becoming choppy.
showers likely with a chance of thunderstorms. 

winds and waves higher in and near thunderstorms.

$$