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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Today
⇑S 7kt
< 1ft
Tonight
⇑SSW 7kt
< 1ft
Sunday
SW 11kt
< 1ft
Sunday Night
SSW 7kt
< 1ft
Monday
⇑SSW 9kt
< 1ft
Monday Night
SW 6kt
< 1ft
Tuesday
⇑SSW 9kt
< 1ft
Tuesday Night
SSW 7kt
< 1ft
Wednesday
⇑SSW 13kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 5:17 am EST Mar 7, 2026
Forecast Valid: 5am EST Mar 7, 2026-6pm EDT Mar 13, 2026

View Nearby Observations

Detailed Forecast

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING...

Today

Variable winds less than 5 kt becoming S 5 to 7 kt in the afternoon. Areas of dense fog before 10am, then Patchy dense fog between 11am and 3pm. Seas 1 ft or less.

Tonight

Variable winds less than 5 kt becoming SSW 5 to 7 kt in the evening. Patchy fog after 8pm. Seas 1 ft or less.

Sunday

SW wind 8 to 11 kt. A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Seas 1 ft or less.

Sunday Night

SSW wind 5 to 7 kt. A chance of showers and thunderstorms before 4am, then a slight chance of showers. Seas 1 ft or less.

Monday

Variable winds less than 5 kt becoming SSW 5 to 9 kt in the morning. A slight chance of showers and thunderstorms after 1pm. Seas 1 ft or less.

Monday Night

SW wind around 6 kt. A slight chance of showers after 1am. Seas 1 ft or less.

Tuesday

Variable winds less than 5 kt becoming SSW 5 to 9 kt in the morning. A slight chance of showers after 1pm. Seas 1 ft or less.

Tuesday Night

SSW wind around 7 kt. Partly cloudy. Seas 1 ft or less.

Wednesday

SSW wind 7 to 10 kt increasing to 10 to 13 kt in the afternoon. Winds could gust as high as 20 kt. Partly 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.