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

63°F

17°C

Humidity 89%
Wind Speed SW 5 mph
Barometer 30.03 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 22 Mar 4:55 am CDT
Extended Forecast for

Grand Isle LA

  • Today

    Today: Sunny, with a high near 71. Southwest wind 5 to 10 mph.

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 66. Southwest wind 5 to 10 mph.

    Low: 66 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 72. Calm wind becoming south around 5 mph in the afternoon.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64. Southwest wind around 5 mph.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 71. Northwest wind around 5 mph becoming south in the afternoon.

    High: 71 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 65. Southwest wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 72. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66. South wind around 5 mph.

    Low: 66 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 72. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 71. Southwest wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 66. Southwest wind 5 to 10 mph.
Monday
Sunny, with a high near 72. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 64. Southwest wind around 5 mph.
Tuesday
Mostly sunny, with a high near 71. Northwest wind around 5 mph becoming south in the afternoon.
Tuesday Night
Partly cloudy, with a low around 65. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 72. Calm wind becoming southeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 66. South wind around 5 mph.
Thursday
Mostly sunny, with a high near 72. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 66. Southeast wind around 5 mph.
Friday
Sunny, with a high near 74. Calm wind becoming southeast around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 62. South wind around 5 mph becoming north after midnight.
Saturday
Sunny, with a high near 71. North 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:
2:07 am CDT Mar 22, 2026
Forecast Valid:
4am CDT Mar 22, 2026-6pm CDT Mar 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation