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New Orleans/Baton Rouge, LA Local Forecast Office

3NM SW Grand Isle LA

Marine Point Forecast

[NOTICE]

Wednesday
High: 89 °F
Light Wind
< 1ft
Wednesday Night
Low: 82 °F
Light Wind
< 1ft
Thursday
High: 88 °F
Light Wind
< 1ft
Thursday Night
Low: 81 °F
Light Wind
< 1ft
Friday
High: 87 °F
Light Wind
< 1ft
Friday Night
Low: 80 °F
Light Wind
< 1ft
Saturday
High: 88 °F
Light Wind
< 1ft
Saturday Night
Low: 81 °F
Light Wind
< 1ft
Sunday
High: 88 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:37 am CDT Aug 26, 2026
Forecast Valid: 1am CDT Aug 26, 2026-6pm CDT Sep 1, 2026

View Nearby Observations

Detailed Forecast

Wednesday

Variable winds 5 kt or less. A chance of showers and thunderstorms, mainly after 2pm. Seas 1 ft or less.

Wednesday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms, mainly after 4am. Seas 1 ft or less.

Thursday

Variable winds 5 kt or less. Showers and thunderstorms, mainly before 3pm. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Seas 1 ft or less.

Friday

Variable winds 5 kt or less. Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Seas 1 ft or less.

Friday Night

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

Saturday

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

Saturday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms, mainly after 1am. Seas 1 ft or less.

Sunday

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

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.