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New Orleans/Baton Rouge, LA Local Forecast Office

3NM SW Grand Isle LA

Marine Point Forecast

[NOTICE]

This Afternoon
High: 76 °F
SE 10kt
1ft
Tonight
Low: 73 °F
SE 10kt
1ft
Thursday
High: 76 °F
SE 10kt
1ft
Thursday Night
Low: 70 °F
SE 10kt
1ft
Friday
High: 76 °F
ESE 10kt
1ft
Friday Night
Low: 71 °F
ESE 10kt
1ft
Saturday
High: 77 °F
SE 10kt
1ft
Saturday Night
Low: 68 °F
Light Wind
1ft
Sunday
High: 74 °F
N 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 11:31 am CDT Apr 1, 2026
Forecast Valid: 12pm CDT Apr 1, 2026-6pm CDT Apr 7, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SE wind around 10 kt. A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Seas around 1 ft.

Tonight

SE wind around 10 kt. A slight chance of showers and thunderstorms before 8pm. Patchy fog after 5am. Seas around 1 ft.

Thursday

SE wind around 10 kt. A chance of showers and thunderstorms, mainly after 1pm. Patchy fog before 8am. Seas around 1 ft.

Thursday Night

SE wind around 10 kt. Mostly cloudy. Seas around 1 ft.

Friday

ESE wind around 10 kt. A chance of showers and thunderstorms. Seas around 1 ft.

Friday Night

ESE wind around 10 kt. A slight chance of thunderstorms before 7pm. Seas around 1 ft.

Saturday

SE wind around 10 kt. A chance of showers and thunderstorms, mainly after 1pm. Seas around 1 ft.

Saturday Night

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

Sunday

WNW wind 5 to 10 kt becoming N in the afternoon. Showers likely and possibly a thunderstorm. 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.