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New Orleans/Baton Rouge, LA Local Forecast Office

3NM SW Grand Isle LA

Marine Point Forecast

[NOTICE]

Today
High: 71 °F
SE 15kt
1ft
Tonight
Low: 66 °F
SE 10kt
1ft
Sunday
High: 73 °F
NE 10kt
< 1ft
Sunday Night
Low: 60 °F
NE 15kt
1ft
Monday
High: 73 °F
NE 15kt
1ft
Monday Night
Low: 59 °F
NW 15kt
1ft
Tuesday
High: 68 °F
NNW 15kt
1ft
Tuesday Night
Low: 51 °F
N 15kt
1ft
Wednesday
High: 64 °F
E 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 9:16 am CST Nov 29, 2025
Forecast Valid: 10am CST Nov 29, 2025-6pm CST Dec 5, 2025

View Nearby Observations

Detailed Forecast

Today

SE wind 10 to 15 kt. Partly sunny. Seas around 1 ft.

Tonight

SE wind 5 to 10 kt. Partly cloudy. Seas around 1 ft.

Sunday

SE wind 5 to 10 kt becoming NE in the afternoon. A slight chance of showers after 9am. Seas 1 ft or less.

Sunday Night

NE wind 10 to 15 kt, with gusts as high as 25 kt. A slight chance of showers before 3am. Seas around 1 ft.

Monday

NE wind 10 to 15 kt becoming ESE in the afternoon. Winds could gust as high as 20 kt. A chance of showers before noon, then a chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Seas around 1 ft.

Monday Night

SE wind 10 to 15 kt becoming NW after midnight. Showers and possibly a thunderstorm. Seas around 1 ft.

Tuesday

NNW wind around 15 kt, with gusts as high as 20 kt. A chance of showers before noon. Seas around 1 ft.

Tuesday Night

N wind 10 to 15 kt becoming NE after midnight. Partly cloudy. Seas around 1 ft.

Wednesday

E wind 5 to 10 kt. Mostly sunny. 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.