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Charleston, SC Local Forecast Office

Charleston Harbor MR

Marine Point Forecast

[NOTICE]

Today
S 10kt
< 1ft
Tonight
SSW 9kt
< 1ft
Friday
SSW 11kt
< 1ft
Friday Night
SSW 8kt
< 1ft
Saturday
SW 11kt
< 1ft
Saturday Night
SSW 8kt
< 1ft
Sunday
⇑E 8kt
< 1ft
Sunday Night
ENE 8kt
< 1ft
Monday
E 10kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:35 am EDT Apr 23, 2026
Forecast Valid: 7am EDT Apr 23, 2026-6pm EDT Apr 29, 2026

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Detailed Forecast

Today

WSW wind 5 to 10 kt becoming S in the afternoon. Patchy smoke before 2pm. Seas 1 ft or less.

Tonight

SSW wind 7 to 9 kt. Patchy smoke before midnight. Seas 1 ft or less.

Friday

WSW wind 6 to 11 kt becoming SSW in the afternoon. Sunny. Seas 1 ft or less.

Friday Night

SSW wind around 8 kt. Mostly clear. Seas 1 ft or less.

Saturday

SW wind 6 to 11 kt. A chance of showers after 2pm. Seas 1 ft or less.

Saturday Night

SSW wind 5 to 8 kt becoming W after midnight. A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Seas 1 ft or less.

Sunday

Variable winds less than 5 kt becoming E 5 to 8 kt in the morning. A chance of showers. Seas 1 ft or less.

Sunday Night

ENE wind 6 to 8 kt. A slight chance of showers and thunderstorms. Seas 1 ft or less.

Monday

E wind around 10 kt. A slight chance of showers after 2pm. Seas 1 ft or less.

Winds and waves higher in and near tstms.

*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.