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3NM SW Grand Isle LA

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 12:51 am CDT Mar 12, 2026
Forecast Valid: 1am CDT Mar 12, 2026-6pm CDT Mar 18, 2026

Thursday

NW wind 20 to 30 kt becoming NNE in the afternoon. Mostly cloudy through mid morning, then gradual clearing. Seas 1 to 2 ft.

Thursday Night

NNE wind 15 to 20 kt decreasing to 10 to 15 kt after midnight. Mostly clear. Seas around 1 ft.

Friday

Variable winds 5 kt or less. Sunny. Seas 1 ft or less.

Friday Night

Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

Saturday

Variable winds 5 kt or less. Sunny. Seas 1 ft or less.

Saturday Night

ESE wind 5 to 10 kt becoming S after midnight. Partly cloudy. Seas around 1 ft.

Sunday

SSW wind around 10 kt. Mostly sunny. Seas around 1 ft.

Sunday Night

SSW wind 10 to 15 kt becoming WNW after midnight. A chance of showers and thunderstorms after 1am. Seas around 1 ft.

Monday

N wind around 20 kt, with gusts as high as 25 kt. A slight chance of showers and thunderstorms before 1pm. Seas around 1 ft.

*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.