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17NM E Grand Isle LA

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 11:31 pm CST Nov 22, 2025
Forecast Valid: 12am CST Nov 23, 2025-6pm CST Nov 29, 2025

Overnight

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

Sunday

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

Sunday Night

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

Monday

E wind 5 to 10 kt becoming SSE in the afternoon. Mostly sunny. Seas 1 ft or less.

Monday Night

SSE wind around 10 kt. A slight chance of showers after midnight. Seas 1 ft or less.

Tuesday

S wind 5 to 10 kt. A chance of showers, with thunderstorms also possible after noon. Seas around 1 ft.

Tuesday Night

Variable winds 5 kt or less. A chance of showers, with thunderstorms also possible after 9pm. Seas 1 ft or less.

Wednesday

N wind 5 to 10 kt. A chance of showers and thunderstorms before noon, then a slight chance of showers. Seas 1 ft or less.

Wednesday Night

NNE wind 10 to 15 kt, with gusts as high as 20 kt. Partly cloudy. Seas around 1 ft.

Winds and seas higher in and near thunderstorms.

*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.