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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Tonight
E 8kt⇓
< 1ft
Friday
Light Wind
< 1ft
Friday Night
Light Wind
< 1ft
Saturday
⇑ESE 8kt
< 1ft
Saturday Night
ESE 6kt⇓
< 1ft
Sunday
⇑E 7kt
< 1ft
Sunday Night
Light Wind
< 1ft
Monday
⇑E 7kt
< 1ft
Monday Night
Light Wind
< 1ft

Associated Zone Forecast which includes this point

Last Update: 4:32 pm EDT Sep 17, 2026
Forecast Valid: 4pm EDT Sep 17, 2026-6pm EDT Sep 24, 2026

View Nearby Observations

Detailed Forecast

Tonight

E wind 5 to 8 kt becoming variable and less than 5 kt in the evening. Mostly clear. Seas 1 ft or less.

Friday

Variable winds 5 kt or less. Sunny. Seas 1 ft or less.

Friday Night

Variable winds 5 kt or less. A slight chance of showers and thunderstorms before 2am, then a chance of showers between 2am and 3am. Seas 1 ft or less.

Saturday

Variable winds less than 5 kt becoming ESE 5 to 8 kt in the afternoon. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

Saturday Night

ESE wind around 6 kt becoming variable and less than 5 kt in the evening. A chance of showers and thunderstorms, mainly before 8pm. Seas 1 ft or less.

Sunday

Variable winds less than 5 kt becoming E 5 to 7 kt in the afternoon. A chance of showers and thunderstorms. Seas 1 ft or less.

Sunday Night

Variable winds 5 kt or less. A chance of thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 2am. Seas 1 ft or less.

Monday

Variable winds less than 5 kt becoming E 5 to 7 kt in the afternoon. A chance of showers and thunderstorms, mainly after 8am. Seas 1 ft or less.

Monday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms. 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 84 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.