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New Orleans/Baton Rouge, LA Local Forecast Office

11NM N Grand Isle LA

Marine Point Forecast

[NOTICE]

This Afternoon
High: 91 °F
WNW 10kt
< 1ft
Tonight
Low: 83 °F
NW 10kt
< 1ft
Monday
High: 91 °F
NNW 10kt
< 1ft
Monday Night
Low: 83 °F
WNW 10kt
< 1ft
Tuesday
High: 91 °F
NNW 10kt
< 1ft
Tuesday Night
Low: 82 °F
W 20kt
< 1ft
Wednesday
High: 89 °F
W 25kt
< 1ft
Wednesday Night
Low: 82 °F
Tropical Storm Conditions Possible
Thursday
High: 89 °F
⇑NW 15kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:26 pm CDT Jul 19, 2026
Forecast Valid: 1pm CDT Jul 19, 2026-6pm CDT Jul 25, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

WNW wind 5 to 10 kt. Sunny. Seas 1 ft or less.

Tonight

WSW wind 5 to 10 kt becoming NW after midnight. Partly cloudy. Seas 1 ft or less.

Monday

NNW wind 5 to 10 kt. A chance of showers and thunderstorms, mainly after 4pm. Seas 1 ft or less.

Monday Night

WNW wind 5 to 10 kt becoming WSW in the evening. A chance of showers and thunderstorms before 11pm, then a slight chance of showers and thunderstorms after 4am. Seas 1 ft or less.

Tuesday

NNW wind around 10 kt. Showers and thunderstorms likely, mainly after 1pm. Seas 1 ft or less.

Tuesday Night

W wind 10 to 20 kt. Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Seas 1 ft or less.

Wednesday

W wind 20 to 25 kt. Showers likely and possibly a thunderstorm before 10am, then showers and thunderstorms likely after 10am. Seas 1 ft or less.

Wednesday Night

Tropical storm conditions possible. A chance of showers and thunderstorms.

Thursday

WSW wind 5 to 10 kt becoming NW 10 to 15 kt in the morning. A chance of showers and thunderstorms. 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.