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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Thursday
⇑S 9kt
< 1ft
Thursday Night
SSW 8kt
< 1ft
Friday
⇑SSW 9kt
< 1ft
Friday Night
SSW 6kt⇓
< 1ft
Saturday
⇑SE 6kt
< 1ft
Saturday Night
Light Wind
< 1ft
Sunday
⇑ESE 7kt
< 1ft
Sunday Night
Light Wind
< 1ft
Monday
⇑SE 7kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:40 am EDT Aug 27, 2026
Forecast Valid: 3am EDT Aug 27, 2026-6pm EDT Sep 2, 2026

View Nearby Observations

Detailed Forecast

Thursday

Variable winds less than 5 kt becoming S 5 to 9 kt in the morning. A chance of showers and thunderstorms. Seas 1 ft or less.

Thursday Night

SSW wind 6 to 8 kt. A chance of showers and thunderstorms, mainly after 3am. Seas 1 ft or less.

Friday

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

Friday Night

SSW wind around 6 kt becoming variable and less than 5 kt in the evening. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Seas 1 ft or less.

Saturday

Variable winds less than 5 kt becoming SE around 6 kt in the afternoon. Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

Saturday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms, mainly after 2am. Seas 1 ft or less.

Sunday

Variable winds less than 5 kt becoming ESE 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. Partly cloudy. Seas 1 ft or less.

Monday

Variable winds less than 5 kt becoming SE 5 to 7 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 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.