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

70°F

21°C

Humidity 83%
Wind Speed S 5 mph
Barometer 30.11 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 11 Oct 9:35 pm CDT
Extended Forecast for

Grand Isle LA

  • Tonight

    Tonight: Partly cloudy, with a low around 78. Southeast wind around 5 mph.

    Low: 78 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Sunny, with a high near 82. East wind 5 to 10 mph.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 78. Southeast wind around 5 mph.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81. Southeast wind around 5 mph.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 77. Southeast wind around 5 mph.

    Low: 77 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82. East wind 5 to 10 mph.

    High: 82 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 77. East wind 5 to 10 mph.

    Low: 77 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 82. East wind 5 to 10 mph.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 78. East wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 78. Southeast wind around 5 mph.
Columbus Day
Sunny, with a high near 82. East wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 78. Southeast wind around 5 mph.
Tuesday
Sunny, with a high near 81. Southeast wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 77. Southeast wind around 5 mph.
Wednesday
Sunny, with a high near 82. East wind 5 to 10 mph.
Wednesday Night
Clear, with a low around 77. East wind 5 to 10 mph.
Thursday
Sunny, with a high near 82. East wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 78. East wind 5 to 10 mph.
Friday
Sunny, with a high near 82. Northeast wind 10 to 15 mph.
Friday Night
A slight chance of showers. Mostly clear, with a low around 71. Windy, with an east wind 5 to 10 mph becoming north 20 to 30 mph.
Saturday
Mostly sunny, with a high near 76. Windy, with a north wind 30 to 35 mph.
Saturday Night
Partly cloudy, with a low around 70. Windy, with a northeast wind 25 to 30 mph.
Sunday
A slight chance of showers. Mostly sunny, with a high near 76. Windy, with a northeast wind 25 to 30 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grand Isle LA
 29.23°N 89.99°W
Last Update:
5:01 pm CDT Oct 11, 2026
Forecast Valid:
9pm CDT Oct 11, 2026-6pm CDT Oct 18, 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