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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Late Afternoon
NNW 19kt
< 1ft

Small Craft Advisory
Tonight
NE 17kt⇓
< 1ft

Small Craft Advisory
Friday
NE 9kt
< 1ft
Friday Night
Light Wind
< 1ft
Saturday
⇑E 6kt
< 1ft
Saturday Night
Light Wind
< 1ft
Sunday
ESE 11kt
< 1ft
Sunday Night
⇑S 14kt
< 1ft
Monday
SSW 19kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:30 pm EDT Mar 12, 2026
Forecast Valid: 4pm EDT Mar 12, 2026-6pm EDT Mar 19, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING...

Late Afternoon

NNW wind 17 to 19 kt, with gusts as high as 27 kt. A slight chance of showers before 5pm. Seas 1 ft or less.

Tonight

NE wind 14 to 17 kt decreasing to 11 to 14 kt after midnight. Winds could gust as high as 25 kt. Mostly clear. Seas 1 ft or less.

Friday

NE wind 5 to 9 kt becoming S in the afternoon. Sunny. Seas 1 ft or less.

Friday Night

Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

Saturday

Variable winds less than 5 kt becoming E around 6 kt in the afternoon. Sunny. Seas 1 ft or less.

Saturday Night

Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

Sunday

E wind 6 to 11 kt becoming ESE in the afternoon. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Seas 1 ft or less.

Sunday Night

S wind 8 to 11 kt increasing to 11 to 14 kt after midnight. Winds could gust as high as 20 kt. Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers likely and possibly a thunderstorm after 2am. Seas 1 ft or less.

Monday

SSW wind 16 to 19 kt, with gusts as high as 28 kt. Showers and possibly a thunderstorm. 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.