National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Galliano, South Lafourche Airport (KGAO)

Lat: 29.44°NLon: 90.26°WElev: 0ft.

Fair

72°F

22°C

Humidity 69%
Wind Speed NE 12 mph
Barometer 30.16 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 19 Oct 5:35 pm CDT
Extended Forecast for

Grand Isle LA

  • Tonight

    Tonight: Partly cloudy, with a low around 72. Breezy, with an east wind around 20 mph.

    Low: 72 °F

    Partly Cloudy
    and Breezy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. Breezy, with a northeast wind 15 to 20 mph.

    High: 77 °F

    Sunny and
    Breezy then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69. Northeast wind 10 to 15 mph.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 77. Northeast wind 10 to 15 mph.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 68. Northeast wind 5 to 10 mph.

    Low: 68 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 78. Northeast wind around 10 mph.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 68. Northeast wind around 5 mph becoming calm.

    Low: 68 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 77. Northeast wind around 10 mph.

    High: 77 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 68. East wind around 15 mph.

    Low: 68 °F

    Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 72. Breezy, with an east wind around 20 mph.
Tuesday
Mostly sunny, with a high near 77. Breezy, with a northeast wind 15 to 20 mph.
Tuesday Night
Mostly clear, with a low around 69. Northeast wind 10 to 15 mph.
Wednesday
Sunny, with a high near 77. Northeast wind 10 to 15 mph.
Wednesday Night
Clear, with a low around 68. Northeast wind 5 to 10 mph.
Thursday
Sunny, with a high near 78. Northeast wind around 10 mph.
Thursday Night
Clear, with a low around 68. Northeast wind around 5 mph becoming calm.
Friday
Sunny, with a high near 77. Northeast wind around 10 mph.
Friday Night
Clear, with a low around 68. East wind around 15 mph.
Saturday
Sunny, with a high near 76. Breezy, with an east wind 15 to 25 mph.
Saturday Night
Mostly clear, with a low around 69. Breezy, with an east wind 20 to 25 mph.
Sunday
Mostly sunny, with a high near 75. Breezy, with an east wind around 25 mph.
Sunday Night
Partly cloudy, with a low around 68. Breezy, with an east wind around 20 mph.
Monday
Mostly sunny, with a high near 75. Breezy, with a northeast wind 15 to 20 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grand Isle LA
 29.24°N 90.01°W
Last Update:
5:16 pm CDT Oct 19, 2026
Forecast Valid:
5pm CDT Oct 19, 2026-6pm CDT Oct 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation