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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Wednesday
E 14kt
< 1ft
Wednesday Night
E 9kt⇓
< 1ft
Thursday
⇑S 8kt
< 1ft
Thursday Night
S 7kt
< 1ft
Friday
⇑SSW 8kt
< 1ft
Friday Night
S 7kt⇓
< 1ft
Saturday
⇑S 8kt
< 1ft
Saturday Night
S 6kt⇓
< 1ft
Sunday
⇑S 7kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 8:32 pm EDT Sep 8, 2026
Forecast Valid: 1am EDT Sep 9, 2026-6pm EDT Sep 15, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

Wednesday

E wind 10 to 14 kt. A chance of showers and thunderstorms, mainly between noon and 4pm. Seas 1 ft or less.

Wednesday Night

E wind 5 to 9 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms, mainly between 11pm and 5am. 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 8am, then a chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Seas 1 ft or less.

Thursday Night

S wind 5 to 7 kt. A chance of thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 2am. Seas 1 ft or less.

Friday

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

Friday Night

S wind 5 to 7 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms. Seas 1 ft or less.

Saturday

Variable winds less than 5 kt becoming S 5 to 8 kt in the afternoon. Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

Saturday Night

S wind around 6 kt becoming variable and less than 5 kt in the evening. A chance of showers and thunderstorms. Seas 1 ft or less.

Sunday

Variable winds less than 5 kt becoming S 5 to 7 kt in the afternoon. A chance of showers and thunderstorms. 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.