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

47°F

8°C

Humidity 61%
Wind Speed N 17 mph
Barometer 30.28 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 4 Feb 10:15 pm CST
Extended Forecast for

Grand Isle LA

  • Tonight

    Tonight: Mostly clear, with a low around 41. Breezy, with a north wind 20 to 25 mph.

    Low: 41 °F

    Mostly Clear
    and Breezy

  • Thursday

    Thursday: Sunny, with a high near 53. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 53 °F

    Sunny and
    Breezy then
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. Northwest wind 10 to 15 mph.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 62. West wind around 15 mph.

    High: 62 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 52. West wind 10 to 15 mph becoming north after midnight.

    Low: 52 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 61. North wind 10 to 15 mph becoming east in the afternoon.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 54. East wind around 5 mph.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 63. East wind around 5 mph.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57. Southeast wind around 5 mph becoming calm after midnight.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 41. Breezy, with a north wind 20 to 25 mph.
Thursday
Sunny, with a high near 53. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph.
Thursday Night
Mostly clear, with a low around 48. Northwest wind 10 to 15 mph.
Friday
Sunny, with a high near 62. West wind around 15 mph.
Friday Night
Mostly clear, with a low around 52. West wind 10 to 15 mph becoming north after midnight.
Saturday
Sunny, with a high near 61. North wind 10 to 15 mph becoming east in the afternoon.
Saturday Night
Mostly clear, with a low around 54. East wind around 5 mph.
Sunday
Sunny, with a high near 63. East wind around 5 mph.
Sunday Night
Mostly clear, with a low around 57. Southeast wind around 5 mph becoming calm after midnight.
Monday
Sunny, with a high near 65. Calm wind becoming southeast around 5 mph in the morning.
Monday Night
Partly cloudy, with a low around 59. South wind around 5 mph.
Tuesday
Partly sunny, with a high near 65. Southeast wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 59. South wind around 5 mph.
Wednesday
Mostly sunny, with a high near 66. South wind 5 to 10 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grand Isle LA
 29.23°N 89.99°W
Last Update:
9:17 pm CST Feb 4, 2026
Forecast Valid:
10pm CST Feb 4, 2026-6pm CST Feb 11, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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