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New Orleans/Baton Rouge, LA Local Forecast Office

11NM N Grand Isle LA

Marine Point Forecast

[NOTICE]

Tonight
Low: 84 °F
E 15kt
< 1ft
Wednesday
High: 86 °F
NE 15kt
< 1ft
Wednesday Night
Low: 83 °F
E 10kt
< 1ft
Thursday
High: 86 °F
Light Wind
< 1ft
Thursday Night
Low: 79 °F
Light Wind
< 1ft
Friday
High: 86 °F
S 10kt
< 1ft
Friday Night
Low: 80 °F
Light Wind
< 1ft
Saturday
High: 86 °F
Light Wind
< 1ft
Saturday Night
Low: 80 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:29 pm CDT Sep 8, 2026
Forecast Valid: 7pm CDT Sep 8, 2026-6pm CDT Sep 15, 2026

View Nearby Observations

Detailed Forecast

Tonight

E wind 10 to 15 kt. A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 2am. Seas 1 ft or less.

Wednesday

E wind 10 to 15 kt becoming NE in the afternoon. Showers and thunderstorms, mainly before 4pm. Seas 1 ft or less.

Wednesday Night

E wind 5 to 10 kt. A chance of showers and thunderstorms, mainly after 1am. Seas 1 ft or less.

Thursday

Variable winds 5 kt or less. Showers and possibly a thunderstorm. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms after 1am. Seas 1 ft or less.

Friday

WSW wind 5 to 10 kt becoming S in the afternoon. Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Seas 1 ft or less.

Friday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms, mainly after 1am. Seas 1 ft or less.

Saturday

Variable winds 5 kt or less. Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Seas 1 ft or less.

Saturday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms, mainly after 1am. Seas 1 ft or less.

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.