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New Orleans/Baton Rouge, LA Local Forecast Office

29NM NE Grand Isle LA

Marine Point Forecast

[NOTICE]

Overnight
Low: 85 °F
Light Wind
< 1ft
Monday
High: 84 °F
Light Wind
< 1ft
Monday Night
Low: 82 °F
Light Wind
1ft
Tuesday
High: 88 °F
NW 10kt
< 1ft
Tuesday Night
Low: 82 °F
WNW 10kt
1-2ft
Wednesday
High: 88 °F
NW 10kt
1-2ft
Wednesday Night
Low: 80 °F
ESE 10kt
1ft
Thursday
High: 86 °F
SE 10kt
1-2ft
Thursday Night
Low: 80 °F
S 10kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 10:21 pm CDT Jul 13, 2025
Forecast Valid: 11pm CDT Jul 13, 2025-6pm CDT Jul 20, 2025

View Nearby Observations

Detailed Forecast

Overnight

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 before 4pm. Seas 1 ft or less.

Monday Night

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

Tuesday

NW wind 5 to 10 kt becoming S in the afternoon. A chance of showers and thunderstorms. Seas 1 ft or less.

Tuesday Night

SSW wind 5 to 10 kt becoming WNW after midnight. A slight chance of showers and thunderstorms after 1am. Seas 1 to 2 ft.

Wednesday

NW wind 5 to 10 kt becoming ESE in the afternoon. Showers likely and possibly a thunderstorm before 10am, then showers and thunderstorms likely after 10am. Seas 1 to 2 ft.

Wednesday Night

ESE wind around 10 kt becoming NE after midnight. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Seas around 1 ft.

Thursday

NNE wind around 10 kt becoming SE in the afternoon. Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms after 1pm. Seas 1 to 2 ft.

Thursday Night

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

Winds and waves 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.