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Charleston, SC Local Forecast Office

21NM NNE Altamaha Sound FL

Marine Point Forecast

[NOTICE]

    • This Afternoon

      This Afternoon:Variable winds less than 5 km/h becoming S 6 to 11 km/h. Mostly sunny. Seas around 1 m.

      ⇑S 11km/h
      1m

    • Tonight

      Tonight:S wind 13 to 16 km/h becoming WSW 10 to 13 km/h after midnight. Partly cloudy. Seas around 1 m.

      S 16km/h⇓
      1m

    • Monday

      Monday:WNW wind 5 to 8 km/h becoming variable and less than 5 km/h. Sunny. Seas around 1 m.

      WNW 8km/h⇓
      1m

    • Monday Night

      Monday Night:SSE wind 5 to 8 km/h becoming variable and less than 5 km/h in the evening. Mostly clear. Seas 1 m or less.

      SSE 8km/h⇓
      < 1m

    • Tuesday

      Tuesday:ENE wind 26 to 31 km/h increasing to 42 to 47 km/h. Winds could gust as high as 55 km/h. A chance of showers and thunderstorms before 2pm. Seas around 1 m.

      ⇑ENE 47km/h
      1m

    • Tuesday Night

      Tuesday Night:ENE wind 40 to 45 km/h decreasing to 35 to 40 km/h after midnight. Mostly clear. Seas around 2 m.

      ENE 45km/h⇓
      2m

    • Wednesday

      Wednesday:NE wind 34 to 37 km/h increasing to 37 to 40 km/h in the afternoon. Winds could gust as high as 47 km/h. Mostly sunny. Seas 1 to 2 m.

      ⇑NE 40km/h
      1-2m

    • Wednesday Night

      Wednesday Night:ENE wind 35 to 40 km/h decreasing to 29 to 34 km/h after midnight. Winds could gust as high as 50 km/h. Mostly clear. Seas around 2 m.

      ENE 40km/h⇓
      2m

    • Thursday

      Thursday:ENE wind 29 to 34 km/h increasing to 37 to 42 km/h. A chance of showers and thunderstorms, mainly after 2pm. Seas 1 to 2 m.

      ⇑ENE 42km/h
      1-2m


Associated Zone Forecast which includes this point

Last Update: 8:32 am EDT Sep 13, 2026
Forecast Valid: 1pm EDT Sep 13, 2026-6pm EDT Sep 19, 2026

View Nearby Observations

Detailed Forecast


This Afternoon
Variable winds less than 5 km/h becoming S 6 to 11 km/h. Mostly sunny. Seas around 1 m.
Tonight
S wind 13 to 16 km/h becoming WSW 10 to 13 km/h after midnight. Partly cloudy. Seas around 1 m.
Monday
WNW wind 5 to 8 km/h becoming variable and less than 5 km/h. Sunny. Seas around 1 m.
Monday Night
SSE wind 5 to 8 km/h becoming variable and less than 5 km/h in the evening. Mostly clear. Seas 1 m or less.
Tuesday
ENE wind 26 to 31 km/h increasing to 42 to 47 km/h. Winds could gust as high as 55 km/h. A chance of showers and thunderstorms before 2pm. Seas around 1 m.
Tuesday Night
ENE wind 40 to 45 km/h decreasing to 35 to 40 km/h after midnight. Mostly clear. Seas around 2 m.
Wednesday
NE wind 34 to 37 km/h increasing to 37 to 40 km/h in the afternoon. Winds could gust as high as 47 km/h. Mostly sunny. Seas 1 to 2 m.
Wednesday Night
ENE wind 35 to 40 km/h decreasing to 29 to 34 km/h after midnight. Winds could gust as high as 50 km/h. Mostly clear. Seas around 2 m.
Thursday
ENE wind 29 to 34 km/h increasing to 37 to 42 km/h. A chance of showers and thunderstorms, mainly after 2pm. Seas 1 to 2 m.

Winds and seas higher in and near tstms.

*Notices:

  1. 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.
  2. 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.
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ABOUT THIS FORECAST

Point Forecast: 31.62°N 81.12°W
Last Update: 8:32 am EDT Sep 13, 2026
Forecast Valid: 1pm EDT Sep 13, 2026-6pm EDT Sep 19, 2026
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