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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Tonight
ESE 9kt⇓
< 1ft
Friday
⇑SSE 9kt
< 1ft
Friday Night
S 7kt
< 1ft
Saturday
⇑SSW 9kt
< 1ft
Saturday Night
SSW 9kt
< 1ft
Sunday
⇑E 7kt
< 1ft
Sunday Night
ENE 9kt
< 1ft
Labor Day
⇑ENE 17kt
< 1ft
Monday Night
ENE 14kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:48 pm EDT Sep 3, 2026
Forecast Valid: 5pm EDT Sep 3, 2026-6pm EDT Sep 10, 2026

View Nearby Observations

Detailed Forecast

Tonight

ESE wind 5 to 9 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.

Friday

Variable winds less than 5 kt becoming SSE 5 to 9 kt in the afternoon. Sunny. Seas 1 ft or less.

Friday Night

S wind 5 to 7 kt becoming SW after midnight. Mostly clear. Seas 1 ft or less.

Saturday

Variable winds less than 5 kt becoming SSW 5 to 9 kt in the afternoon. Sunny. Seas 1 ft or less.

Saturday Night

SSW wind 6 to 9 kt becoming WSW after midnight. A chance of showers and thunderstorms. 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, then showers and possibly a thunderstorm after 2pm. Seas 1 ft or less.

Sunday Night

ENE wind around 9 kt. Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Seas 1 ft or less.

Labor Day

ENE wind 11 to 14 kt increasing to 14 to 17 kt in the afternoon. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8am. Seas 1 ft or less.

Monday Night

ENE wind 11 to 14 kt, with gusts as high as 20 kt. 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 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.