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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Tonight
E 13kt⇓
< 1ft
Thursday
E 10kt
< 1ft
Thursday Night
Light Wind
< 1ft
Friday
⇑SE 6kt
< 1ft
Friday Night
S 6kt⇓
< 1ft
Saturday
⇑ESE 9kt
< 1ft
Saturday Night
ESE 7kt⇓
< 1ft
Sunday
⇑E 8kt
< 1ft
Sunday Night
Light Wind
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:34 pm EDT Sep 16, 2026
Forecast Valid: 4pm EDT Sep 16, 2026-6pm EDT Sep 23, 2026

View Nearby Observations

Detailed Forecast

Tonight

E wind 10 to 13 kt decreasing to 5 to 8 kt after midnight. Mostly clear. Seas 1 ft or less.

Thursday

NNE wind 7 to 10 kt becoming E in the afternoon. Sunny. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

Friday

Variable winds less than 5 kt becoming SE around 6 kt in the afternoon. Sunny. Seas 1 ft or less.

Friday Night

S wind around 6 kt becoming variable and less than 5 kt in the evening. Mostly clear. Seas 1 ft or less.

Saturday

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

Saturday Night

ESE wind 5 to 7 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms before 2am, then a slight chance of showers. Seas 1 ft or less.

Sunday

Variable winds less than 5 kt becoming E 5 to 8 kt in the morning. A chance of showers, with thunderstorms also possible after 2pm. 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.

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.