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Charleston Harbor MR

[NOTICE]

Last Update: 2:30 pm EDT Mar 9, 2026
Forecast Valid: 4pm EDT Mar 9, 2026-6pm EDT Mar 16, 2026

Tonight

S wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Patchy fog after 2am. Seas 1 ft or less.

Tuesday

S wind 6 to 9 kt. A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Seas 1 ft or less.

Tuesday Night

SW wind around 8 kt. A slight chance of showers and thunderstorms before 8pm. Seas 1 ft or less.

Wednesday

SSW wind 7 to 10 kt increasing to 10 to 13 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

Wednesday Night

SSW wind around 14 kt, with gusts as high as 20 kt. Mostly cloudy. Seas 1 ft or less.

Thursday

SSW wind 13 to 16 kt becoming W in the afternoon. Winds could gust as high as 23 kt. Showers, mainly after 2pm. Seas 1 ft or less.

Thursday Night

NNE wind 16 to 19 kt. Showers, mainly before 8pm. Seas 1 ft or less.

Friday

ENE wind 10 to 14 kt. A slight chance of showers. Seas 1 ft or less.

Friday Night

ESE wind around 6 kt becoming W after midnight. Mostly clear. 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 61 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.