Last Update: 509 AM EDT Thu Sep 18 2025

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Charleston, SC Local Forecast Office

27NM NE Altamaha Sound FL

Marine Zone Forecast


Today
SW winds 5 kt, becoming W later this morning, then E 5 to 10 kt this afternoon. Seas 1 to 2 ft. Wave detail: E 2 ft at 8 seconds and SW 1 foot at 3 seconds.
Tonight
SE winds 5 to 10 kt. Seas 1 to 2 ft. Wave detail: E 2 ft at 8 seconds and SE 1 foot at 3 seconds.
Fri
NE winds 5 to 10 kt. Seas 1 to 2 ft. Wave detail: E 2 ft at 8 seconds and SE 1 foot at 4 seconds.
Fri Night
E winds 5 to 10 kt. Seas 2 to 3 ft. Wave detail: E 2 ft at 8 seconds.
Sat
NE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 2 to 3 ft, building to 3 to 4 ft in the afternoon. Wave detail: E 3 ft at 8 seconds, becoming E 4 ft at 8 seconds. A slight chance of showers and tstms in the afternoon.
Sat Night
NE winds 15 to 20 kt. Seas 4 ft. Wave detail: E 4 ft at 6 seconds. A slight chance of showers and tstms.
Sun
NE winds 15 to 20 kt. Seas 4 to 5 ft. A slight chance of showers and tstms.
Sun Night
NE winds 20 to 25 kt. Seas 4 to 5 ft. A slight chance of showers and tstms.
Mon
NE winds 15 to 20 kt. Seas 4 to 5 ft. A chance of showers and tstms.
Mon Night
E winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers and tstms.

winds and seas higher in and near tstms.




Winds and seas higher in and near tstms.
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509 AM EDT Thu Sep 18 2025
 
 

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