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

72°F

22°C

Humidity 65%
Wind Speed NE 16 G 20 mph
Barometer 30.25 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 19 Oct 11:15 am CDT
Extended Forecast for

15 Miles SW Grand Isle LA

  • Today

    Today: Mostly sunny, with a high near 78. Breezy, with a northeast wind 15 to 20 mph.

    High: 78 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 68. Breezy, with an east wind 15 to 20 mph.

    Low: 68 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80. Breezy, with an east wind 15 to 20 mph.

    High: 80 °F

    Mostly Sunny
    and Breezy
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66. Northeast wind 10 to 15 mph.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. Northeast wind 10 to 15 mph.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 66. Northeast wind 5 to 10 mph.

    Low: 66 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 79. Northeast wind around 10 mph.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 66. Northeast wind around 5 mph.

    Low: 66 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 79. Northeast wind around 10 mph.

    High: 79 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 78. Breezy, with a northeast wind 15 to 20 mph.
Tonight
Mostly cloudy, with a low around 68. Breezy, with an east wind 15 to 20 mph.
Tuesday
Mostly sunny, with a high near 80. Breezy, with an east wind 15 to 20 mph.
Tuesday Night
Mostly clear, with a low around 66. Northeast wind 10 to 15 mph.
Wednesday
Sunny, with a high near 78. Northeast wind 10 to 15 mph.
Wednesday Night
Clear, with a low around 66. Northeast wind 5 to 10 mph.
Thursday
Sunny, with a high near 79. Northeast wind around 10 mph.
Thursday Night
Clear, with a low around 66. Northeast wind around 5 mph.
Friday
Sunny, with a high near 79. Northeast wind around 10 mph.
Friday Night
Clear, with a low around 67. East wind around 15 mph.
Saturday
Sunny, with a high near 78. Breezy, with an east wind 15 to 20 mph.
Saturday Night
Mostly clear, with a low around 67. Breezy, with an east wind 20 to 25 mph.
Sunday
Mostly sunny, with a high near 78. Breezy, with an east wind 20 to 25 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
15 Miles SW Grand Isle LA
 29.1°N 90.2°W
Last Update:
1:57 am CDT Oct 19, 2026
Forecast Valid:
11am CDT Oct 19, 2026-6pm CDT Oct 25, 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