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.

Overcast

73°F

23°C

Humidity 68%
Wind Speed E 10 G 18 mph
Barometer 30.23 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 9 Apr 12:15 pm CDT
Extended Forecast for

Grand Isle LA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 73. Breezy, with an east wind around 20 mph.

    High: 73 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 69. Breezy, with an east wind 15 to 20 mph.

    Low: 69 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Friday

    Friday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 74. East wind around 15 mph.

    High: 74 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 69. East wind 10 to 15 mph.

    Low: 69 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 75. East wind 10 to 15 mph.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 69. East wind around 15 mph.

    Low: 69 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76. Southeast wind around 15 mph.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 71. Breezy, with a southeast wind 15 to 20 mph.

    Low: 71 °F

    Partly Cloudy
    and Breezy

  • Monday

    Monday: Mostly sunny, with a high near 76. Southeast wind around 15 mph.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 73. Breezy, with an east wind around 20 mph.
Tonight
Partly cloudy, with a low around 69. Breezy, with an east wind 15 to 20 mph.
Friday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 74. East wind around 15 mph.
Friday Night
Partly cloudy, with a low around 69. East wind 10 to 15 mph.
Saturday
Sunny, with a high near 75. East wind 10 to 15 mph.
Saturday Night
Mostly clear, with a low around 69. East wind around 15 mph.
Sunday
Sunny, with a high near 76. Southeast wind around 15 mph.
Sunday Night
Partly cloudy, with a low around 71. Breezy, with a southeast wind 15 to 20 mph.
Monday
Mostly sunny, with a high near 76. Southeast wind around 15 mph.
Monday Night
Mostly clear, with a low around 70. Southeast wind around 15 mph.
Tuesday
Sunny, with a high near 77. Southeast wind around 15 mph.
Tuesday Night
Mostly clear, with a low around 71. Southeast wind around 15 mph.
Wednesday
Partly sunny, with a high near 76. Southeast wind 10 to 15 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:
5:37 am CDT Apr 9, 2026
Forecast Valid:
12pm CDT Apr 9, 2026-6pm CDT Apr 15, 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