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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Friday
⇑S 13kt
< 1ft
Friday Night
WSW 10kt
< 1ft
Saturday
⇑WSW 11kt
< 1ft
Saturday Night
SW 9kt
< 1ft
Sunday
SW 10kt
< 1ft
Sunday Night
SSW 8kt
< 1ft
Monday
⇑S 8kt
< 1ft
Monday Night
S 6kt⇓
< 1ft
Tuesday
⇑SSW 9kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 8:30 pm EDT Aug 20, 2026
Forecast Valid: 1am EDT Aug 21, 2026-6pm EDT Aug 27, 2026

View Nearby Observations

Detailed Forecast

Friday

SW wind 6 to 9 kt becoming S 10 to 13 kt in the afternoon. Sunny. Seas 1 ft or less.

Friday Night

WSW wind 8 to 10 kt becoming S in the evening. A chance of showers and thunderstorms, mainly between 10pm and 5am. Seas 1 ft or less.

Saturday

WSW wind 5 to 8 kt increasing to 8 to 11 kt in the afternoon. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Seas 1 ft or less.

Saturday Night

SW wind 6 to 9 kt. Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Seas 1 ft or less.

Sunday

W wind 5 to 10 kt becoming SW in the afternoon. A slight chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

Sunday Night

SSW wind 5 to 8 kt. A slight chance of showers and 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 S 5 to 8 kt in the afternoon. A slight chance of showers and thunderstorms. Seas 1 ft or less.

Monday Night

S wind around 6 kt becoming variable and less than 5 kt after midnight. A slight chance of showers and thunderstorms. Seas 1 ft or less.

Tuesday

Variable winds less than 5 kt becoming SSW 5 to 9 kt in the morning. 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 88 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.