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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Today
E 18kt
< 1ft

Small Craft Advisory
Tonight
SE 12kt
< 1ft
Monday
NNE 10kt
< 1ft
Monday Night
Light Wind
< 1ft
Tuesday
⇑NE 13kt
< 1ft
Tuesday Night
NE 14kt
< 1ft
Wednesday
NNE 15kt
< 1ft
Wednesday Night
NNE 9kt
< 1ft
Thursday
NNE 10kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:40 am EDT May 31, 2026
Forecast Valid: 5am EDT May 31, 2026-6pm EDT Jun 6, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM THIS MORNING TO 2 PM

Today

E wind 14 to 18 kt, with gusts as high as 25 kt. A chance of showers, with thunderstorms also possible after 11am. Seas 1 ft or less.

Tonight

SE wind 8 to 12 kt. Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Seas 1 ft or less.

Monday

E wind 5 to 10 kt becoming N in the morning. Showers and thunderstorms likely, mainly before 10am, then showers likely and possibly a thunderstorm after noon. Seas 1 ft or less.

Monday Night

Variable winds 5 kt or less. A slight chance of showers and thunderstorms, then a chance of showers after 2am. Seas 1 ft or less.

Tuesday

NE wind 6 to 9 kt increasing to 10 to 13 kt in the afternoon. Showers likely, with thunderstorms also possible after 11am. Seas 1 ft or less.

Tuesday Night

NE wind around 14 kt, with gusts as high as 20 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Wednesday

NNE wind around 15 kt, with gusts as high as 23 kt. Sunny. Seas 1 ft or less.

Wednesday Night

NNE wind 5 to 9 kt. Mostly clear. Seas 1 ft or less.

Thursday

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

*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.