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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Today
⇑S 9kt
< 1ft
Tonight
SSW 8kt⇓
< 1ft
Friday
⇑S 11kt
< 1ft
Friday Night
SSW 8kt
< 1ft
Saturday
⇑SSW 14kt
< 1ft
Saturday Night
SSW 13kt
< 1ft
Sunday
⇑SSW 17kt
< 1ft
Sunday Night
SSW 12kt
< 1ft
Monday
SSW 11kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:30 am EDT Jul 16, 2026
Forecast Valid: 7am EDT Jul 16, 2026-6pm EDT Jul 22, 2026

View Nearby Observations

Detailed Forecast

Today

Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. Partly sunny, then gradually becoming sunny. Seas 1 ft or less.

Tonight

SSW wind 5 to 8 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.

Friday

Variable winds less than 5 kt becoming S 6 to 11 kt in the afternoon. Sunny. Seas 1 ft or less.

Friday Night

SSW wind 6 to 8 kt. Mostly clear. Seas 1 ft or less.

Saturday

SSW wind 5 to 8 kt increasing to 11 to 14 kt in the afternoon. Winds could gust as high as 20 kt. Sunny. Seas 1 ft or less.

Saturday Night

SSW wind 11 to 13 kt, with gusts as high as 20 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Sunday

SSW wind 9 to 12 kt increasing to 14 to 17 kt in the afternoon. Winds could gust as high as 23 kt. A chance of showers and thunderstorms, mainly after 2pm. Seas 1 ft or less.

Sunday Night

SSW wind 7 to 12 kt. A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Seas 1 ft or less.

Monday

SSW wind 6 to 11 kt. A chance of showers before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Seas 1 ft or less.

Winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston Harbor water temperature 86 degrees.

*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.