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

73°F

23°C

Humidity 78%
Wind Speed N 6 mph
Barometer 29.87 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 4 Nov 6:35 pm CST
Extended Forecast for

Grand Isle LA

  • Tonight

    Tonight: Mostly clear, with a low around 68. Southwest wind around 5 mph becoming north after midnight.

    Low: 68 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 77. North wind around 5 mph becoming calm in the morning.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 69. Light and variable wind becoming northwest 5 to 10 mph after midnight.

    Low: 69 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 76. North wind 5 to 10 mph.

    High: 76 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 66. North wind 5 to 10 mph increasing to 10 to 15 mph after midnight.

    Low: 66 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 74. Northeast wind 10 to 15 mph.

    High: 74 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 63. Northeast wind 10 to 15 mph.

    Low: 63 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 70. Northeast wind 10 to 15 mph.

    High: 70 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 62. Northeast wind 10 to 15 mph.

    Low: 62 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 68. Southwest wind around 5 mph becoming north after midnight.
Thursday
Sunny, with a high near 77. North wind around 5 mph becoming calm in the morning.
Thursday Night
Mostly clear, with a low around 69. Light and variable wind becoming northwest 5 to 10 mph after midnight.
Friday
Partly sunny, with a high near 76. North wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 66. North wind 5 to 10 mph increasing to 10 to 15 mph after midnight.
Saturday
Mostly sunny, with a high near 74. Northeast wind 10 to 15 mph.
Saturday Night
Partly cloudy, with a low around 63. Northeast wind 10 to 15 mph.
Sunday
Partly sunny, with a high near 70. Northeast wind 10 to 15 mph.
Sunday Night
Mostly cloudy, with a low around 62. Northeast wind 10 to 15 mph.
Monday
Mostly sunny, with a high near 71. North wind 10 to 15 mph.
Monday Night
Partly cloudy, with a low around 64. North wind around 10 mph.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 72. North wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 64. North wind 5 to 10 mph.
Veterans Day
Mostly sunny, with a high near 72. Northeast wind 5 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Isle LA
 29.23°N 89.99°W
Last Update:
5:19 pm CST Nov 4, 2026
Forecast Valid:
6pm CST Nov 4, 2026-6pm CST Nov 11, 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