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

67°F

19°C

Humidity 77%
Wind Speed N 14 G 17 mph
Barometer 30.14 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 10 Jan 5:55 pm CST
Extended Forecast for

Grand Isle LA

  • Tonight

    Tonight: Mostly cloudy, with a low around 53. Windy, with a north wind 15 to 20 mph increasing to 25 to 30 mph after midnight.

    Low: 53 °F

    Mostly Cloudy
    and Windy

  • Sunday

    Sunday: Mostly sunny, with a high near 59. Windy, with a north wind 20 to 30 mph.

    High: 59 °F

    Mostly Sunny
    and Windy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 49. Breezy, with a northeast wind 20 to 25 mph.

    Low: 49 °F

    Mostly Cloudy
    and Breezy

  • Monday

    Monday: Mostly sunny, with a high near 55. Breezy, with a northeast wind 10 to 20 mph.

    High: 55 °F

    Partly Sunny
    and Breezy
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 50. Northeast wind around 10 mph.

    Low: 50 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 58. Northeast wind 5 to 10 mph becoming light north in the afternoon.

    High: 58 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 54. Light and variable wind becoming west 5 to 10 mph after midnight.

    Low: 54 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers, mainly before noon. Partly sunny, with a high near 64. West wind 10 to 15 mph.

    High: 64 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 47. Breezy, with a west wind 15 to 25 mph becoming north after midnight.

    Low: 47 °F

    Partly Cloudy
    and Breezy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 53. Windy, with a north wind 15 to 20 mph increasing to 25 to 30 mph after midnight.
Sunday
Mostly sunny, with a high near 59. Windy, with a north wind 20 to 30 mph.
Sunday Night
Mostly cloudy, with a low around 49. Breezy, with a northeast wind 20 to 25 mph.
Monday
Mostly sunny, with a high near 55. Breezy, with a northeast wind 10 to 20 mph.
Monday Night
Mostly cloudy, with a low around 50. Northeast wind around 10 mph.
Tuesday
Partly sunny, with a high near 58. Northeast wind 5 to 10 mph becoming light north in the afternoon.
Tuesday Night
A 30 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 54. Light and variable wind becoming west 5 to 10 mph after midnight.
Wednesday
A 30 percent chance of showers, mainly before noon. Partly sunny, with a high near 64. West wind 10 to 15 mph.
Wednesday Night
Partly cloudy, with a low around 47. Breezy, with a west wind 15 to 25 mph becoming north after midnight.
Thursday
Sunny, with a high near 54. Breezy, with a north wind 15 to 25 mph.
Thursday Night
Mostly clear, with a low around 49. North wind 5 to 15 mph.
Friday
Sunny, with a high near 62. North wind 5 to 10 mph becoming south in the morning.
Friday Night
Mostly clear, with a low around 55. Southwest wind around 10 mph becoming north after midnight.
Saturday
Mostly sunny, with a high near 63. Northeast wind 10 to 15 mph becoming southeast in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grand Isle LA
 29.23°N 89.99°W
Last Update:
12:40 pm CST Jan 10, 2026
Forecast Valid:
6pm CST Jan 10, 2026-6pm CST Jan 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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