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Charleston Harbor MR

[NOTICE]

Last Update: 2:35 am EDT Aug 17, 2026
Forecast Valid: 4am EDT Aug 17, 2026-6pm EDT Aug 23, 2026

Monday

Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. A slight chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

Monday Night

SSW wind 7 to 10 kt becoming WSW after midnight. Mostly clear. Seas 1 ft or less.

Tuesday

W wind 5 to 9 kt becoming SSW in the afternoon. A chance of showers and thunderstorms, mainly after 4pm. Seas 1 ft or less.

Tuesday Night

SW wind 5 to 8 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms, mainly before 7pm. Seas 1 ft or less.

Wednesday

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

Wednesday Night

Variable winds 5 kt or less. A slight chance of showers and thunderstorms before 8pm. Seas 1 ft or less.

Thursday

Variable winds less than 5 kt becoming S 5 to 10 kt in the afternoon. Sunny. Seas 1 ft or less.

Thursday Night

S wind 6 to 8 kt. Partly cloudy. Seas 1 ft or less.

Friday

Variable winds less than 5 kt becoming S 6 to 11 kt in the morning. A slight chance of showers and thunderstorms 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.