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New Orleans/Baton Rouge, LA Local Forecast Office

3NM SW Grand Isle LA

Marine Point Forecast

[NOTICE]

Today
High: 75 °F
SE 10kt
1ft
Tonight
Low: 71 °F
SE 10kt
1ft
Wednesday
High: 76 °F
SSE 10kt
1ft
Wednesday Night
Low: 62 °F
W 20kt
1-2ft
Thursday
High: 69 °F
NNW 25kt
1ft
Thursday Night
Low: 59 °F
NNE 20kt
1ft
Friday
High: 69 °F
E 10kt
1ft
Friday Night
Low: 64 °F
Light Wind
1ft
Saturday
High: 73 °F
Light Wind
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:34 am CDT Mar 10, 2026
Forecast Valid: 7am CDT Mar 10, 2026-6pm CDT Mar 16, 2026

View Nearby Observations

Detailed Forecast

Today

SE wind 5 to 10 kt. Patchy fog before 11am. Seas around 1 ft.

Tonight

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

Wednesday

SSE wind around 10 kt. Partly sunny. Seas around 1 ft.

Wednesday Night

S wind 15 to 20 kt becoming W after midnight. Winds could gust as high as 30 kt. Showers and possibly a thunderstorm. Seas 1 to 2 ft.

Thursday

NNW wind 20 to 25 kt becoming NNE in the afternoon. Winds could gust as high as 35 kt. A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Seas around 1 ft.

Thursday Night

NNE wind 10 to 20 kt, with gusts as high as 30 kt. Mostly clear. Seas around 1 ft.

Friday

E wind 5 to 10 kt. Sunny. Seas around 1 ft.

Friday Night

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

Saturday

Variable winds 5 kt or less. 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.