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

68°F

20°C

Humidity 78%
Wind Speed E 3 mph
Barometer 30.15 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 28 Oct 8:15 pm CDT
Extended Forecast for

Grand Isle LA

  • Tonight

    Tonight: Mostly clear, with a low around 68. East wind 5 to 15 mph.

    Low: 68 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. Northeast wind around 15 mph.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 70. Northeast wind around 10 mph.

    Low: 70 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 77. East wind around 15 mph.

    High: 77 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers after 4am. Mostly cloudy, with a low around 71. East wind 10 to 15 mph.

    Low: 71 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. East wind 10 to 15 mph. Chance of precipitation is 50%.

    High: 77 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. East wind around 10 mph.

    Low: 71 °F

    Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 76. Northeast wind around 10 mph.

    High: 76 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers. Partly cloudy, with a low around 70. East wind around 10 mph.

    Low: 70 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 68. East wind 5 to 15 mph.
Thursday
Sunny, with a high near 75. Northeast wind around 15 mph.
Thursday Night
Partly cloudy, with a low around 70. Northeast wind around 10 mph.
Friday
Partly sunny, with a high near 77. East wind around 15 mph.
Friday Night
A 20 percent chance of showers after 4am. Mostly cloudy, with a low around 71. East wind 10 to 15 mph.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. East wind 10 to 15 mph. Chance of precipitation is 50%.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. East wind around 10 mph.
Sunday
A 40 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 76. Northeast wind around 10 mph.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 70. East wind around 10 mph.
Monday
A slight chance of showers. Partly sunny, with a high near 75. East wind 10 to 15 mph.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 71. Southeast wind 10 to 15 mph.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 76. Southeast wind around 15 mph.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 70. Southeast wind around 15 mph.
Wednesday
A chance of showers. Mostly sunny, with a high near 75. South 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:
6:11 pm CDT Oct 28, 2026
Forecast Valid:
8pm CDT Oct 28, 2026-6pm CST Nov 4, 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