For More Weather Information:

17NM E Grand Isle LA

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 10:36 pm CDT Sep 27, 2026
Forecast Valid: 1am CDT Sep 28, 2026-6pm CDT Oct 4, 2026

Monday

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

Monday Night

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

Tuesday

NE wind 5 to 10 kt becoming ESE in the afternoon. Sunny. Seas 1 ft or less.

Tuesday Night

ESE wind around 10 kt. Mostly clear. Seas 1 ft or less.

Wednesday

SE wind 10 to 15 kt. A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Seas around 1 ft.

Wednesday Night

SE wind 10 to 15 kt. A slight chance of showers and thunderstorms before 1am. Seas around 1 ft.

Thursday

SE wind around 15 kt. A chance of showers and thunderstorms. Seas around 1 ft.

Thursday Night

ESE wind 10 to 15 kt. A chance of showers and thunderstorms. Seas around 1 ft.

Friday

E wind 10 to 15 kt. Showers likely and possibly a thunderstorm. 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.