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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Today
E 9kt
< 1ft
Tonight
Light Wind
< 1ft
Tuesday
⇑ESE 8kt
< 1ft
Tuesday Night
Light Wind
< 1ft
Wednesday
⇑SE 8kt
< 1ft
Wednesday Night
SSE 6kt⇓
< 1ft
Thursday
⇑S 8kt
< 1ft
Thursday Night
S 7kt⇓
< 1ft
Friday
⇑SSW 8kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:35 am EDT Aug 31, 2026
Forecast Valid: 5am EDT Aug 31, 2026-6pm EDT Sep 6, 2026

View Nearby Observations

Detailed Forecast

Today

NNE wind 5 to 9 kt becoming ESE in the afternoon. A chance of showers and thunderstorms, mainly between noon and 5pm. Seas 1 ft or less.

Tonight

Variable winds 5 kt or less. A slight chance of showers and thunderstorms before 7pm. Seas 1 ft or less.

Tuesday

Variable winds less than 5 kt becoming ESE 5 to 8 kt in the morning. A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and noon. Seas 1 ft or less.

Tuesday Night

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

Wednesday

Variable winds less than 5 kt becoming SE 5 to 8 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

Wednesday Night

SSE wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 1 ft or less.

Thursday

Variable winds less than 5 kt becoming S 5 to 8 kt in the afternoon. A slight chance of showers and thunderstorms before 2pm. Seas 1 ft or less.

Thursday Night

S wind 5 to 7 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 SSW 5 to 8 kt in the afternoon. A slight 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 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.