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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Thursday
⇑SSE 9kt
< 1ft
Thursday Night
S 7kt
< 1ft
Friday
⇑S 11kt
< 1ft
Friday Night
SW 10kt
< 1ft
Saturday
⇑SW 11kt
< 1ft
Saturday Night
SSW 9kt
< 1ft
Sunday
SSW 10kt
< 1ft
Sunday Night
SW 8kt
< 1ft
Monday
⇑S 9kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 3:06 am EDT Aug 20, 2026
Forecast Valid: 4am EDT Aug 20, 2026-6pm EDT Aug 26, 2026

View Nearby Observations

Detailed Forecast

Thursday

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

Thursday Night

S wind around 7 kt becoming SSW after midnight. Mostly clear. Seas 1 ft or less.

Friday

Variable winds less than 5 kt becoming S 6 to 11 kt in the morning. A chance of showers and thunderstorms, mainly after 3pm. Seas 1 ft or less.

Friday Night

SW wind 7 to 10 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Saturday

SW wind 5 to 8 kt increasing to 8 to 11 kt in the afternoon. Showers and thunderstorms likely, mainly after 2pm. Seas 1 ft or less.

Saturday Night

SSW wind 7 to 9 kt. Showers and thunderstorms likely, mainly before 8pm. Seas 1 ft or less.

Sunday

W wind 5 to 10 kt becoming SSW in the afternoon. A slight chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

Sunday Night

SW wind 6 to 8 kt. A slight chance of showers and thunderstorms before 8pm. Seas 1 ft or less.

Monday

Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. A slight chance of showers and thunderstorms 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 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.