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

62°F

17°C

Humidity 90%
Wind Speed SW 5 mph
Barometer 30.03 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 22 Mar 3:35 am CDT
Extended Forecast for

Grand Isle LA

  • Overnight

    Overnight: Mostly clear, with a low around 65. Southwest wind around 5 mph.

    Low: 65 °F

    Mostly Clear

  • Sunday

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

    High: 71 °F

    Sunny

  • Sunday Night

    Sunday Night: 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

Detailed Forecast

Overnight
Mostly clear, with a low around 65. Southwest wind around 5 mph.
Sunday
Sunny, with a high near 71. Southwest wind 5 to 10 mph.
Sunday Night
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
Tiles ©ESRI

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:
3am CDT Mar 22, 2026-6pm CDT Mar 28, 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