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New Orleans/Baton Rouge, LA Local Forecast Office

4NM SW Grand Isle LA

Marine Point Forecast

[NOTICE]

Sunday
High: 69 °F
Light Wind
1ft
Sunday Night
Low: 56 °F
⇑N 20kt
1ft

Small Craft Advisory
Monday
High: 58 °F
N 20kt
1ft

Small Craft Advisory
Monday Night
Low: 52 °F
NE 15kt
1ft
Tuesday
High: 61 °F
NE 10kt
< 1ft
Tuesday Night
Low: 55 °F
Light Wind
< 1ft
Wednesday
High: 69 °F
Light Wind
1ft
Wednesday Night
Low: 63 °F
Light Wind
1ft
Thursday
High: 71 °F
SSW 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 11:31 pm CST Dec 6, 2025
Forecast Valid: 1am CST Dec 7, 2025-6pm CST Dec 13, 2025

View Nearby Observations

Detailed Forecast

Sunday

Variable winds 5 kt or less. Showers and thunderstorms likely before 3pm, then a slight chance of showers between 3pm and 4pm. Seas around 1 ft.

Sunday Night

ENE wind 5 to 10 kt becoming N 15 to 20 kt after midnight. Winds could gust as high as 25 kt. A chance of showers, mainly before midnight. Seas around 1 ft.

Monday

N wind 15 to 20 kt, with gusts as high as 25 kt. Mostly cloudy, then gradually becoming sunny. Seas around 1 ft.

Monday Night

NE wind 10 to 15 kt. Partly cloudy. Seas around 1 ft.

Tuesday

NE wind 5 to 10 kt. 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 around 1 ft.

Wednesday Night

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

Thursday

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

*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.