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Charleston, SC Local Forecast Office

3NM NNE Altamaha Sound FL

Marine Point Forecast

[NOTICE]

This Afternoon
SE 16km/h
1m
Tonight
SSE 16km/h⇓
1m
Saturday
⇑S 13km/h
1m
Saturday Night
S 16km/h
1m
Sunday
W 14km/h
< 1m
Sunday Night
SSW 11km/h⇓
< 1m
Labor Day
⇑ENE 32km/h
1m
Monday Night
ENE 26km/h
1m
Tuesday
⇑ENE 35km/h
1m

Associated Zone Forecast which includes this point

Last Update: 8:32 am EDT Sep 4, 2026
Forecast Valid: 12pm EDT Sep 4, 2026-6pm EDT Sep 10, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SE wind 13 to 16 km/h. A chance of showers and thunderstorms. Seas around 1 m.

Tonight

SSE wind 13 to 16 km/h becoming SSW 10 to 13 km/h after midnight. A slight chance of showers and thunderstorms before 8pm. Seas around 1 m.

Saturday

SSW wind 5 to 8 km/h becoming S 10 to 13 km/h in the afternoon. Mostly sunny. Seas around 1 m.

Saturday Night

S wind 13 to 16 km/h becoming WSW after midnight. A slight chance of showers and thunderstorms before 2am. Seas around 1 m.

Sunday

W wind 10 to 14 km/h becoming S in the afternoon. Showers and thunderstorms likely, mainly after 2pm. Seas 1 m or less.

Sunday Night

SSW wind 8 to 11 km/h becoming N 5 to 8 km/h in the evening. Showers and thunderstorms likely, mainly before 2am. Seas 1 m or less.

Labor Day

ENE wind 11 to 16 km/h increasing to 27 to 32 km/h. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. Seas around 1 m.

Monday Night

ENE wind 21 to 26 km/h, with gusts as high as 34 km/h. Showers and thunderstorms likely before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Seas around 1 m.

Tuesday

ENE wind 21 to 26 km/h increasing to 30 to 35 km/h. A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Seas around 1 m.

Winds and seas higher in and near tstms.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.