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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

This Afternoon
⇑ESE 7kt
< 1ft
Tonight
E 7kt
< 1ft
Labor Day
⇑ENE 17kt
< 1ft
Monday Night
ENE 14kt
< 1ft
Tuesday
ENE 17kt
< 1ft
Tuesday Night
E 12kt
< 1ft
Wednesday
ENE 10kt
< 1ft
Wednesday Night
ESE 6kt⇓
< 1ft
Thursday
⇑S 8kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 8:32 am EDT Sep 6, 2026
Forecast Valid: 1pm EDT Sep 6, 2026-6pm EDT Sep 12, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

Variable winds less than 5 kt becoming ESE 5 to 7 kt. A chance of showers and thunderstorms, mainly after 3pm. Seas 1 ft or less.

Tonight

E wind 5 to 7 kt becoming ESE in the evening. Showers and thunderstorms likely, mainly before 2am. Seas 1 ft or less.

Labor Day

ENE wind 9 to 12 kt increasing to 14 to 17 kt in the afternoon. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11am. Seas 1 ft or less.

Monday Night

ENE wind 12 to 14 kt, with gusts as high as 21 kt. Showers likely and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Seas 1 ft or less.

Tuesday

ENE wind 13 to 17 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8am. Seas 1 ft or less.

Tuesday Night

E wind 9 to 12 kt. A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am, then a slight chance of showers and thunderstorms after 2am. Seas 1 ft or less.

Wednesday

ENE wind 7 to 10 kt. A slight chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a slight chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

Wednesday Night

ESE wind around 6 kt becoming variable and less than 5 kt in the evening. A slight chance of showers and thunderstorms before 8pm. Seas 1 ft or less.

Thursday

Variable winds less than 5 kt becoming S 5 to 8 kt in the afternoon. 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.