For More Weather Information:

Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Overnight
Light Wind
< 1ft
Thursday
⇑SE 10kt
< 1ft
Thursday Night
SE 6kt⇓
< 1ft
Friday
⇑SSE 8kt
< 1ft
Friday Night
S 7kt
< 1ft
Saturday
⇑SSW 8kt
< 1ft
Saturday Night
SSW 8kt⇓
< 1ft
Sunday
⇑E 9kt
< 1ft
Sunday Night
E 9kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 8:30 pm EDT Sep 2, 2026
Forecast Valid: 12am EDT Sep 3, 2026-6pm EDT Sep 9, 2026

View Nearby Observations

Detailed Forecast

Overnight

Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.

Thursday

Variable winds less than 5 kt becoming SE 5 to 10 kt in the morning. Mostly sunny. Seas 1 ft or less.

Thursday Night

SE wind around 6 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.

Friday

Variable winds less than 5 kt becoming SSE 5 to 8 kt in the afternoon. A slight chance of showers, with thunderstorms also possible after 11am. Seas 1 ft or less.

Friday Night

S wind 5 to 7 kt becoming SW after midnight. Mostly clear. Seas 1 ft or less.

Saturday

Variable winds less than 5 kt becoming SSW 5 to 8 kt in the afternoon. Sunny. Seas 1 ft or less.

Saturday Night

SSW wind 5 to 8 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms. Seas 1 ft or less.

Sunday

Variable winds less than 5 kt becoming E 5 to 9 kt in the afternoon. A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Seas 1 ft or less.

Sunday Night

E wind 6 to 9 kt. Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. 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 86 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.