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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Today
⇑S 9kt
< 1ft
Tonight
S 8kt
< 1ft
Sunday
⇑SSW 8kt
< 1ft
Sunday Night
SSW 7kt⇓
< 1ft
Monday
Light Wind
< 1ft
Monday Night
⇑ENE 6kt
< 1ft
Tuesday
ENE 17kt
< 1ft
Tuesday Night
ENE 12kt
< 1ft
Wednesday
ENE 15kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:40 am EDT Sep 12, 2026
Forecast Valid: 6am EDT Sep 12, 2026-6pm EDT Sep 18, 2026

View Nearby Observations

Detailed Forecast

Today

Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. A chance of showers and thunderstorms, mainly after 10am. Seas 1 ft or less.

Tonight

S wind 6 to 8 kt becoming SW after midnight. A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 4am. Seas 1 ft or less.

Sunday

Variable winds less than 5 kt becoming SSW 5 to 8 kt in the afternoon. A chance of showers and thunderstorms, mainly after 5pm. Seas 1 ft or less.

Sunday Night

SSW wind 5 to 7 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms, mainly before 7pm. Seas 1 ft or less.

Monday

Variable winds 5 kt or less. Sunny. Seas 1 ft or less.

Monday Night

Variable winds less than 5 kt becoming ENE around 6 kt after midnight. Mostly clear. Seas 1 ft or less.

Tuesday

ENE wind 12 to 17 kt. Mostly sunny. Seas 1 ft or less.

Tuesday Night

ENE wind 9 to 12 kt. Mostly clear. Seas 1 ft or less.

Wednesday

ENE wind 10 to 15 kt, with gusts as high as 21 kt. Sunny. 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.