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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Today
S 9kt
< 1ft
Tonight
S 8kt
< 1ft
Monday
⇑SSW 9kt
< 1ft
Monday Night
WSW 7kt
< 1ft
Tuesday
⇑SSW 8kt
< 1ft
Tuesday Night
SSW 7kt
< 1ft
Wednesday
⇑S 11kt
< 1ft
Wednesday Night
SW 7kt
< 1ft
Thursday
⇑SSW 12kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 5:07 am EDT Aug 23, 2026
Forecast Valid: 6am EDT Aug 23, 2026-6pm EDT Aug 29, 2026

View Nearby Observations

Detailed Forecast

Today

WSW wind 5 to 9 kt becoming S in the afternoon. A slight chance of showers and thunderstorms, mainly between 4pm and 5pm. Seas 1 ft or less.

Tonight

S wind 5 to 8 kt becoming SW after midnight. A slight chance of showers and thunderstorms before 9pm. Seas 1 ft or less.

Monday

Variable winds less than 5 kt becoming SSW 5 to 9 kt in the morning. A chance of showers and thunderstorms, mainly after 4pm. Seas 1 ft or less.

Monday Night

WSW wind 5 to 7 kt. A chance of showers and thunderstorms, mainly before 2am. Seas 1 ft or less.

Tuesday

Variable winds less than 5 kt becoming SSW 5 to 8 kt in the afternoon. A chance of showers and thunderstorms, mainly after 2pm. Seas 1 ft or less.

Tuesday Night

SSW wind 5 to 7 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Seas 1 ft or less.

Wednesday

Variable winds less than 5 kt becoming S 6 to 11 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.

Wednesday Night

SW wind around 7 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Thursday

Variable winds less than 5 kt becoming SSW 7 to 12 kt in the morning. Showers and thunderstorms likely, mainly after 2pm. 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 87 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.