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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Tonight
WSW 9kt
< 1ft
Sunday
SSW 10kt
< 1ft
Sunday Night
SSW 9kt
< 1ft
Monday
⇑SSW 9kt
< 1ft
Monday Night
SSW 7kt
< 1ft
Tuesday
⇑SSW 9kt
< 1ft
Tuesday Night
SW 8kt
< 1ft
Wednesday
S 10kt
< 1ft
Wednesday Night
S 8kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:35 pm EDT Aug 22, 2026
Forecast Valid: 6pm EDT Aug 22, 2026-6pm EDT Aug 29, 2026

View Nearby Observations

Detailed Forecast

Tonight

WSW wind 7 to 9 kt. A chance of showers and thunderstorms, mainly before 10pm. Seas 1 ft or less.

Sunday

W wind 6 to 10 kt becoming SSW in the afternoon. A slight chance of showers and thunderstorms between 4pm and 5pm. Seas 1 ft or less.

Sunday Night

SSW wind 6 to 9 kt. A chance of showers and thunderstorms, mainly between 1am and 2am. Seas 1 ft or less.

Monday

Variable winds less than 5 kt becoming SSW 5 to 9 kt in the afternoon. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

Monday Night

SSW wind around 7 kt. A chance of showers and thunderstorms, mainly before 8pm. Seas 1 ft or less.

Tuesday

Variable winds less than 5 kt becoming SSW 5 to 9 kt in the afternoon. A slight chance of showers, then a chance of showers and thunderstorms after 11am. Seas 1 ft or less.

Tuesday Night

SW wind 6 to 8 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 and thunderstorms after 2am. Seas 1 ft or less.

Wednesday

WSW wind 5 to 10 kt becoming S in the afternoon. A chance of showers and thunderstorms. Seas 1 ft or less.

Wednesday Night

S wind around 8 kt. Showers likely and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. 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.