For More Weather Information:

New Orleans/Baton Rouge, LA Local Forecast Office

11NM N Grand Isle LA

Marine Point Forecast

[NOTICE]

Today
High: 66 °F
Light Wind
< 1ft
Tonight
Low: 54 °F
⇑N 15kt
< 1ft

Small Craft Advisory
Monday
High: 55 °F
N 15kt
1ft

Small Craft Advisory
Monday Night
Low: 48 °F
NNE 15kt
< 1ft
Tuesday
High: 58 °F
NNE 10kt⇓
< 1ft
Tuesday Night
Low: 52 °F
Light Wind
< 1ft
Wednesday
High: 66 °F
Light Wind
< 1ft
Wednesday Night
Low: 61 °F
Light Wind
< 1ft
Thursday
High: 69 °F
SSW 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 5:04 am CST Dec 7, 2025
Forecast Valid: 5am CST Dec 7, 2025-6pm CST Dec 13, 2025

View Nearby Observations

Detailed Forecast

Today

Variable winds 5 kt or less. A chance of showers and thunderstorms before noon, then a chance of showers between noon and 3pm. Patchy fog before 8am. Seas 1 ft or less.

Tonight

ENE wind 5 to 10 kt becoming N 10 to 15 kt after midnight. Winds could gust as high as 25 kt. A chance of showers, mainly before midnight. Seas 1 ft or less.

Monday

N wind 10 to 15 kt, with gusts as high as 25 kt. Mostly cloudy, then gradually becoming sunny. Seas around 1 ft.

Monday Night

NNE wind 10 to 15 kt. Mostly clear. Seas 1 ft or less.

Tuesday

NNE wind 5 to 10 kt becoming variable and less than 5 kt in the afternoon. Sunny. Seas 1 ft or less.

Tuesday Night

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

Wednesday

Variable winds 5 kt or less. Sunny. Seas 1 ft or less.

Wednesday Night

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

Thursday

SSW wind 5 to 10 kt. Mostly sunny. Seas 1 ft or less.

*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.