Heavy Rainfall Across South Texas; Heat in the West

Excessive rainfall may produce locally considerable flash flooding over parts of South Texas, the western Gulf Coast, and Lower Mississippi River Valley through Thursday. Hot temperatures will persist over central and northern California and the Pacific Northwest through today. Read More >

For More Weather Information:

New Orleans/Baton Rouge, LA Local Forecast Office

17NM E Grand Isle LA

Marine Point Forecast

[NOTICE]

Tuesday
High: 89 °F
SW 15kt
1ft
Tuesday Night
Low: 80 °F
S 10kt
1ft
Wednesday
High: 91 °F
S 15kt
1ft
Wednesday Night
Low: 82 °F
S 15kt
1ft
Thursday
High: 91 °F
S 20kt
1ft
Thursday Night
Low: 82 °F
S 15kt
1ft
Juneteenth
High: 91 °F
SSW 15kt
1ft
Friday Night
Low: 80 °F
SSW 10kt
1ft
Saturday
High: 90 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:01 am CDT Jun 16, 2026
Forecast Valid: 2am CDT Jun 16, 2026-6pm CDT Jun 22, 2026

View Nearby Observations

Detailed Forecast

Tuesday

SW wind 10 to 15 kt. Showers and thunderstorms likely, mainly before 2pm, then showers likely and possibly a thunderstorm after 4pm. Seas around 1 ft.

Tuesday Night

S wind 5 to 10 kt. A chance of showers and thunderstorms. Seas around 1 ft.

Wednesday

S wind 10 to 15 kt, with gusts as high as 20 kt. A chance of showers and thunderstorms, mainly after 2pm. Seas around 1 ft.

Wednesday Night

S wind around 15 kt, with gusts as high as 25 kt. A chance of showers and thunderstorms after 7pm. Seas around 1 ft.

Thursday

S wind 15 to 20 kt. A chance of showers and thunderstorms. Seas around 1 ft.

Thursday Night

S wind around 15 kt, with gusts as high as 25 kt. Mostly cloudy. Seas around 1 ft.

Juneteenth

SSW wind 10 to 15 kt. A slight chance of showers and thunderstorms. Seas around 1 ft.

Friday Night

SSW wind 5 to 10 kt. A chance of showers and thunderstorms, mainly before 1am. Seas around 1 ft.

Saturday

Variable winds 5 kt or less. A slight 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.