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

84°F

29°C

Humidity 55%
Wind Speed SE 9 mph
Barometer 30.03 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 15 Oct 3:15 pm CDT
Extended Forecast for

Grand Isle LA

  • Tonight

    Tonight: Increasing clouds, with a steady temperature around 79. East wind 5 to 10 mph.

    Low: 79 °F

    Increasing
    Clouds

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 83. Northeast wind 5 to 10 mph.

    High: 83 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 64. Windy, with a north wind 5 to 15 mph increasing to 25 to 35 mph after midnight.

    Low: 64 °F

    Partly Cloudy
    and Windy

  • Saturday

    Saturday: Sunny, with a high near 73. Windy, with a northeast wind 25 to 35 mph, with gusts as high as 45 mph.

    High: 73 °F

    Sunny and
    Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 66. Breezy, with a northeast wind around 25 mph.

    Low: 66 °F

    Mostly Clear
    and Breezy

  • Sunday

    Sunday: Mostly sunny, with a high near 74. Breezy, with a northeast wind around 25 mph.

    High: 74 °F

    Mostly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 69. Breezy, with an east wind 20 to 25 mph.

    Low: 69 °F

    Partly Cloudy
    and Breezy

  • Monday

    Monday: Mostly sunny, with a high near 76. Breezy, with a northeast wind around 25 mph.

    High: 76 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 71. Breezy, with an east wind around 20 mph.

    Low: 71 °F

    Partly Cloudy
    and Breezy

Detailed Forecast

Tonight
Increasing clouds, with a steady temperature around 79. East wind 5 to 10 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 83. Northeast wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 64. Windy, with a north wind 5 to 15 mph increasing to 25 to 35 mph after midnight.
Saturday
Sunny, with a high near 73. Windy, with a northeast wind 25 to 35 mph, with gusts as high as 45 mph.
Saturday Night
Mostly clear, with a low around 66. Breezy, with a northeast wind around 25 mph.
Sunday
Mostly sunny, with a high near 74. Breezy, with a northeast wind around 25 mph.
Sunday Night
Partly cloudy, with a low around 69. Breezy, with an east wind 20 to 25 mph.
Monday
Mostly sunny, with a high near 76. Breezy, with a northeast wind around 25 mph.
Monday Night
Partly cloudy, with a low around 71. Breezy, with an east wind around 20 mph.
Tuesday
Mostly sunny, with a high near 77. Breezy, with a northeast wind 20 to 25 mph.
Tuesday Night
Mostly clear, with a low around 71. Northeast wind around 15 mph.
Wednesday
Sunny, with a high near 77. Breezy, with a northeast wind 15 to 20 mph.
Wednesday Night
Clear, with a low around 71. East wind 10 to 15 mph.
Thursday
Sunny, with a high near 78. Northeast wind around 15 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Isle LA
 29.23°N 89.99°W
Last Update:
3:17 pm CDT Oct 15, 2026
Forecast Valid:
3pm CDT Oct 15, 2026-6pm CDT Oct 22, 2026
 
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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