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New Orleans/Baton Rouge, LA Local Forecast Office

3NM SW Grand Isle LA

Marine Point Forecast

[NOTICE]

Overnight
Low: 85 °F
SSW 10kt
1ft
Sunday
High: 89 °F
WSW 10kt
1ft
Sunday Night
Low: 81 °F
SW 10kt
1ft
Monday
High: 88 °F
W 10kt
1ft
Monday Night
Low: 80 °F
W 10kt
1ft
Tuesday
High: 88 °F
Light Wind
1ft
Tuesday Night
Low: 82 °F
Light Wind
1ft
Wednesday
High: 88 °F
Light Wind
1ft
Wednesday Night
Low: 83 °F
Light Wind
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 5:37 pm CDT Jul 11, 2026
Forecast Valid: 12am CDT Jul 12, 2026-6pm CDT Jul 18, 2026

View Nearby Observations

Detailed Forecast

Overnight

SSW wind 5 to 10 kt. A slight chance of showers and thunderstorms between 3am and 4am. Seas around 1 ft.

Sunday

WSW wind 5 to 10 kt. Showers and thunderstorms likely, mainly before 1pm. Seas around 1 ft.

Sunday Night

SW wind 5 to 10 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Seas around 1 ft.

Monday

W wind 5 to 10 kt. Showers and possibly a thunderstorm. Seas around 1 ft.

Monday Night

W wind 5 to 10 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Seas around 1 ft.

Tuesday

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

Tuesday Night

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

Wednesday

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

Wednesday Night

Variable winds 5 kt or less. 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.