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New Orleans/Baton Rouge, LA Local Forecast Office

3NM SW Grand Isle LA

Marine Point Forecast

[NOTICE]

Today
High: 76 °F
Light Wind
< 1ft
Tonight
Low: 67 °F
SE 10kt
1ft
Sunday
High: 79 °F
S 10kt
1ft
Sunday Night
Low: 50 °F
⇑WNW 25kt
1ft
Monday
High: 60 °F
NNW 30kt
1ft
Monday Night
Low: 45 °F
NNW 20kt
1ft
Tuesday
High: 58 °F
N 15kt
1ft
Tuesday Night
Low: 52 °F
NNE 10kt
< 1ft
Wednesday
High: 65 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 5:42 am CDT Mar 14, 2026
Forecast Valid: 6am CDT Mar 14, 2026-6pm CDT Mar 20, 2026

View Nearby Observations

Detailed Forecast

Today

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

Tonight

ESE wind 5 to 10 kt becoming S after midnight. Partly cloudy. Seas around 1 ft.

Sunday

S wind around 10 kt. A slight chance of showers after 4pm. Seas around 1 ft.

Sunday Night

S wind 10 to 15 kt becoming WNW 20 to 25 kt after midnight. Showers and possibly a thunderstorm, mainly before 4am, then a chance of showers and thunderstorms after 4am. Seas around 1 ft.

Monday

NNW wind 20 to 30 kt. A chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 10am. Seas around 1 ft.

Monday Night

NNW wind around 20 kt. Mostly cloudy. Seas around 1 ft.

Tuesday

N wind 10 to 15 kt, with gusts as high as 20 kt. Partly sunny. Seas around 1 ft.

Tuesday Night

NNE wind 5 to 10 kt. Mostly clear. Seas 1 ft or less.

Wednesday

Variable winds 5 kt or less. Sunny. 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.