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New Orleans/Baton Rouge, LA Local Forecast Office

3NM SW Grand Isle LA

Marine Point Forecast

[NOTICE]

Wednesday
High: 67 °F
ENE 10kt
< 1ft
Wednesday Night
Low: 63 °F
ESE 10kt
1ft
Thursday
High: 68 °F
ENE 20kt
1ft
Thursday Night
Low: 61 °F
E 20kt
1ft
Friday
High: 66 °F
NW 15kt
1ft
Friday Night
Low: 59 °F
NNE 10kt
1ft
Saturday
High: 66 °F
NE 10kt
1ft
Saturday Night
Low: 61 °F
Light Wind
1ft
Sunday
High: 68 °F
N 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:19 am CST Dec 3, 2025
Forecast Valid: 1am CST Dec 3, 2025-6pm CST Dec 9, 2025

View Nearby Observations

Detailed Forecast

Wednesday

ENE wind 5 to 10 kt. Mostly cloudy. Seas 1 ft or less.

Wednesday Night

ESE wind 5 to 10 kt. A chance of showers, mainly after midnight. Seas around 1 ft.

Thursday

ENE wind 15 to 20 kt. Showers, with thunderstorms also possible after noon. Seas around 1 ft.

Thursday Night

E wind 10 to 20 kt becoming N after midnight. Showers likely and possibly a thunderstorm before 9pm, then showers likely between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Seas around 1 ft.

Friday

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

Friday Night

NNE wind 5 to 10 kt. Showers. Seas around 1 ft.

Saturday

NE wind 5 to 10 kt. Showers likely, with thunderstorms also possible after noon. Seas around 1 ft.

Saturday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms. Seas around 1 ft.

Sunday

N 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.