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New Orleans/Baton Rouge, LA Local Forecast Office

11NM N Grand Isle LA

Marine Point Forecast

[NOTICE]

Late Afternoon
High: 85 °F
Light Wind
< 1ft
Tonight
Low: 82 °F
Light Wind
< 1ft
Sunday
High: 87 °F
Light Wind
< 1ft
Sunday Night
Low: 80 °F
Light Wind
< 1ft
Labor Day
High: 87 °F
Light Wind
< 1ft
Monday Night
Low: 80 °F
Light Wind
< 1ft
Tuesday
High: 86 °F
SE 10kt
< 1ft
Tuesday Night
Low: 80 °F
Light Wind
< 1ft
Wednesday
High: 86 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 4:17 pm CDT Sep 5, 2026
Forecast Valid: 5pm CDT Sep 5, 2026-6pm CDT Sep 12, 2026

View Nearby Observations

Detailed Forecast

Late Afternoon

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

Tonight

Variable winds 5 kt or less. A chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms after 4am. Seas 1 ft or less.

Sunday

Variable winds 5 kt or less. A chance of showers and thunderstorms, mainly after 3pm. Seas 1 ft or less.

Sunday Night

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

Labor Day

Variable winds 5 kt or less. A chance of showers and thunderstorms, mainly after 7am. Seas 1 ft or less.

Monday Night

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

Tuesday

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

Tuesday Night

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

Wednesday

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.

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.