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.

Thunderstorm Rain

75°F

24°C

Humidity 84%
Wind Speed N 3 mph
Barometer 30.11 in
Dewpoint 70°F (21°C)
Visibility 3.00 mi
Last update 19 Jun 7:15 pm CDT
Extended Forecast for

Grand Isle LA

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a steady temperature around 85. Southwest wind around 5 mph.

    Low: 85 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly between 10am and noon. Sunny, with a high near 88. Southwest wind around 5 mph becoming south in the afternoon.

    High: 88 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a steady temperature around 85. Southwest wind around 5 mph.

    Low: 85 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 88. West wind around 5 mph becoming northeast in the morning.

    High: 88 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 83. Southeast wind around 5 mph.

    Low: 83 °F

    Mostly Clear
    then Chance
    T-storms

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms. Sunny, with a high near 88. Southeast wind 5 to 10 mph.

    High: 88 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 82. Southeast wind around 10 mph.

    Low: 82 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Monday

    Monday: Showers likely and possibly a thunderstorm. Sunny, with a high near 88. East wind around 10 mph. Chance of precipitation is 70%.

    High: 88 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 82. Southeast wind around 10 mph.

    Low: 82 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a steady temperature around 85. Southwest wind around 5 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly between 10am and noon. Sunny, with a high near 88. Southwest wind around 5 mph becoming south in the afternoon.
Friday Night
Partly cloudy, with a steady temperature around 85. Southwest wind around 5 mph.
Saturday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 88. West wind around 5 mph becoming northeast in the morning.
Saturday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 83. Southeast wind around 5 mph.
Sunday
A 50 percent chance of showers and thunderstorms. Sunny, with a high near 88. Southeast wind 5 to 10 mph.
Sunday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 82. Southeast wind around 10 mph.
Monday
Showers likely and possibly a thunderstorm. Sunny, with a high near 88. East wind around 10 mph. Chance of precipitation is 70%.
Monday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 82. Southeast wind around 10 mph.
Tuesday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 88. East wind around 10 mph.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Southeast wind around 10 mph.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. East wind around 10 mph.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Southeast wind around 10 mph.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Southeast wind around 10 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:
7:26 pm CDT Jun 19, 2025
Forecast Valid:
7pm CDT Jun 19, 2025-6pm CDT Jun 26, 2025
 
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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