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

82°F

28°C

Humidity 63%
Wind Speed E 3 mph
Barometer 30.04 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 18 Sep 6:55 pm CDT
Extended Forecast for

6 Miles SW Grand Isle LA

  • Tonight

    Tonight: Mostly clear, with a low around 81. East wind 5 to 15 mph.

    Low: 81 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 88. East wind 5 to 10 mph.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 81. Southeast wind around 5 mph.

    Low: 81 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 88. Northeast wind around 5 mph.

    High: 88 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 82. Southeast wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 82 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms. Sunny, with a high near 88. North wind 5 to 10 mph becoming east in the afternoon.

    High: 88 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 80. East wind around 5 mph becoming calm.

    Low: 80 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 89. Northeast wind 5 to 10 mph.

    High: 89 °F

    Sunny then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 81. East wind around 5 mph becoming calm in the evening.

    Low: 81 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 81. East wind 5 to 15 mph.
Saturday
Sunny, with a high near 88. East wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 81. Southeast wind around 5 mph.
Sunday
Sunny, with a high near 88. Northeast wind around 5 mph.
Sunday Night
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 82. Southeast wind around 5 mph becoming calm. Chance of precipitation is 20%.
Monday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 88. North wind 5 to 10 mph becoming east in the afternoon.
Monday Night
Partly cloudy, with a low around 80. East wind around 5 mph becoming calm.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 89. Northeast wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 81. East wind around 5 mph becoming calm in the evening.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 89. Northeast wind 5 to 15 mph.
Wednesday Night
A slight chance of showers. Mostly clear, with a low around 79. East wind 5 to 10 mph.
Thursday
A slight chance of showers and thunderstorms. Sunny, with a high near 88. Breezy, with a northeast wind 15 to 20 mph.
Thursday Night
Mostly clear, with a low around 79. Northeast wind 10 to 15 mph.
Friday
Mostly sunny, with a high near 87. Breezy, with a northeast wind 15 to 20 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles SW Grand Isle LA
 29.17°N 90.07°W
Last Update:
2:02 pm CDT Sep 18, 2026
Forecast Valid:
7pm CDT Sep 18, 2026-6pm CDT Sep 25, 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