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

28°C

82°F

Humidity 78%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 23°C (74°F)
Visibility 16 km
Heat Index31°C (88°F)
Last update 2 Jul 7:35 pm CDT
Extended Forecast for

13 Miles WSW Grand Isle LA

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 27. West wind 10 to 15 km/h. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.

    Low: 27 °C

    Chance
    T-storms

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 32. Northwest wind around 10 km/h.

    High: 32 °C

    Chance
    T-storms then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 27. Calm wind. Chance of precipitation is 40%.

    Low: 27 °C

    Slight Chance
    Showers then
    Chance
    T-storms

  • Independence Day

    Independence Day: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 32. North wind around 10 km/h.

    High: 32 °C

    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 27. Calm wind. Chance of precipitation is 30%.

    Low: 27 °C

    Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 32. North wind around 10 km/h becoming southeast in the afternoon.

    High: 32 °C

    Chance
    Showers

  • Saturday Night

    Saturday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly clear, with a low around 27. Calm wind. Chance of precipitation is 40%.

    Low: 27 °C

    Slight Chance
    Showers then
    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Sunny, with a high near 32. Northeast wind 5 to 10 km/h becoming southeast in the afternoon. Chance of precipitation is 60%.

    High: 32 °C

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 27. Southeast wind 5 to 10 km/h.

    Low: 27 °C

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Tonight
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 27. West wind 10 to 15 km/h. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 32. Northwest wind around 10 km/h.
Thursday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 27. Calm wind. Chance of precipitation is 40%.
Independence Day
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 32. North wind around 10 km/h.
Friday Night
A slight chance of showers, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 27. Calm wind. Chance of precipitation is 30%.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 32. North wind around 10 km/h becoming southeast in the afternoon.
Saturday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly clear, with a low around 27. Calm wind. Chance of precipitation is 40%.
Sunday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Sunny, with a high near 32. Northeast wind 5 to 10 km/h becoming southeast in the afternoon. Chance of precipitation is 60%.
Sunday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 27. Southeast wind 5 to 10 km/h.
Monday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 31. Southeast wind 5 to 15 km/h.
Monday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 27. South wind 5 to 10 km/h.
Tuesday
Showers and possibly a thunderstorm. Mostly sunny, with a high near 31. Southwest wind 5 to 15 km/h.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 27. Southwest wind 5 to 10 km/h.
Wednesday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 32. Southwest wind 5 to 15 km/h.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
13 Miles WSW Grand Isle LA
 29.15°N 90.17°W
Last Update:
6:20 pm CDT Jul 2, 2025
Forecast Valid:
7pm CDT Jul 2, 2025-6pm CDT Jul 9, 2025
 
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