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New Orleans/Baton Rouge, LA Local Forecast Office

29NM NE Grand Isle LA

Marine Point Forecast

[NOTICE]

Today
High: 68 °F
SE 15kt
3ft
Tonight
Low: 63 °F
SE 10kt
1-2ft
Sunday
High: 70 °F
NNE 15kt
1-3ft
Sunday Night
Low: 57 °F
NE 20kt
4-5ft
Monday
High: 69 °F
NE 20kt
3-4ft
Monday Night
Low: 57 °F
NW 15kt
3-4ft
Tuesday
High: 64 °F
NNW 20kt
3-4ft
Tuesday Night
Low: 49 °F
N 15kt
2-4ft
Wednesday
High: 61 °F
NNE 10kt
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 11:11 am CST Nov 29, 2025
Forecast Valid: 11am CST Nov 29, 2025-6pm CST Dec 5, 2025

View Nearby Observations

Detailed Forecast

Today

SE wind 10 to 15 kt, with gusts as high as 20 kt. Partly sunny. Seas around 3 ft.

Tonight

SE wind 5 to 10 kt. Mostly clear. Seas 1 to 2 ft.

Sunday

ESE wind 5 to 15 kt becoming NNE in the afternoon. A chance of showers, mainly after 3pm. Seas 1 to 3 ft.

Sunday Night

NE wind 15 to 20 kt, with gusts as high as 30 kt. A slight chance of showers before midnight. Seas 4 to 5 ft.

Monday

NE wind 15 to 20 kt becoming E in the afternoon. Winds could gust as high as 30 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 3 to 4 ft.

Monday Night

E wind around 15 kt becoming W after midnight. Winds could gust as high as 25 kt. Showers and possibly a thunderstorm. Seas 3 to 4 ft.

Tuesday

NNW wind around 20 kt, with gusts as high as 25 kt. A chance of showers before noon. Seas 3 to 4 ft.

Tuesday Night

N wind 10 to 15 kt, with gusts as high as 25 kt. Partly cloudy. Seas 2 to 4 ft.

Wednesday

NNE wind 5 to 10 kt becoming E in the afternoon. Mostly sunny. Seas 1 to 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.