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Charleston, SC Local Forecast Office

4NM N Rattlesnake Shoal MR

Marine Point Forecast

[NOTICE]

Today
⇑ESE 6kt
2ft
Tonight
Light Wind
1ft
Sunday
⇑E 7kt
1ft
Sunday Night
Light Wind
1ft
Monday
⇑ESE 7kt
1ft
Monday Night
Light Wind
2ft
Tuesday
ENE 10kt
1-2ft
Tuesday Night
NE 7kt
2ft
Wednesday
NE 14kt
2-3ft

Associated Zone Forecast which includes this point

Last Update: 2:45 am EDT Sep 19, 2026
Forecast Valid: 6am EDT Sep 19, 2026-6pm EDT Sep 25, 2026

View Nearby Observations

Detailed Forecast

Today

Variable winds less than 5 kt becoming ESE around 6 kt in the afternoon. A chance of showers and thunderstorms after 2pm. Seas around 2 ft.

Tonight

Variable winds 5 kt or less. A chance of showers and thunderstorms before 2am, then a slight chance of showers and thunderstorms after 3am. Seas around 1 ft.

Sunday

Variable winds less than 5 kt becoming E 5 to 7 kt in the morning. A chance of showers and thunderstorms, mainly between 1pm and 4pm. Seas around 1 ft.

Sunday Night

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

Monday

Variable winds less than 5 kt becoming ESE 5 to 7 kt in the afternoon. A slight chance of showers, with thunderstorms also possible after 11am. Seas around 1 ft.

Monday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms, mainly after 2am. Seas around 2 ft.

Tuesday

ENE wind 6 to 10 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8am. Seas 1 to 2 ft.

Tuesday Night

NE wind around 7 kt. A chance of showers and thunderstorms. Seas around 2 ft.

Wednesday

NE wind 12 to 14 kt, with gusts as high as 20 kt. A chance of showers and thunderstorms. Seas 2 to 3 ft.

Winds and seas 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.