Heavy to Excessive Rainfall and Flooding Threats in the Central and Eastern U.S.; Heat and Fire Weather Concerns in the West

Thunderstorms producing excessive rainfall and potential flooding concerns will continue through tonight from the Southern Plains to the East Coast. Areas of greatest concern for flooding are over central Texas and the Mid-Atlantic. Heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue through Monday. Read More >

For More Weather Information:

New Orleans/Baton Rouge, LA Local Forecast Office

11NM N Grand Isle LA

Marine Point Forecast

[NOTICE]

Tonight
Low: 85 °F
Light Wind
< 1ft
Monday
High: 85 °F
Light Wind
< 1ft
Monday Night
Low: 80 °F
Light Wind
< 1ft
Tuesday
High: 89 °F
Light Wind
< 1ft
Tuesday Night
Low: 80 °F
WSW 10kt
< 1ft
Wednesday
High: 89 °F
NW 10kt
< 1ft
Wednesday Night
Low: 79 °F
Light Wind
< 1ft
Thursday
High: 86 °F
Light Wind
< 1ft
Thursday 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: 6:20 pm CDT Jul 13, 2025
Forecast Valid: 8pm CDT Jul 13, 2025-6pm CDT Jul 20, 2025

View Nearby Observations

Detailed Forecast

Tonight

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

Monday

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

Monday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms before 7pm. Seas 1 ft or less.

Tuesday

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

Tuesday Night

WSW wind 5 to 10 kt becoming NW after midnight. A slight chance of showers and thunderstorms after 1am. Seas 1 ft or less.

Wednesday

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

Wednesday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Seas 1 ft or less.

Thursday

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

Thursday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm 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.