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

34°F

1°C

Humidity 92%
Wind Speed Calm
Barometer 30.20 in
Dewpoint 32°F (0°C)
Visibility 7.00 mi
Last update 1 Jan 1:35 am CST
Extended Forecast for

Grand Isle LA

  • Overnight

    Overnight: Mostly clear, with a low around 55. West wind around 10 mph.

    Low: 55 °F

    Mostly Clear

  • New Year's Day

    New Year's Day: Sunny, with a high near 67. Northwest wind 5 to 10 mph.

    High: 67 °F

    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 62. Southwest wind around 10 mph.

    Low: 62 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly sunny, with a high near 72. Breezy, with a southwest wind 15 to 20 mph.

    High: 72 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Partly cloudy, with a low around 67. Breezy, with a southwest wind around 20 mph. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely and
    Breezy

  • Saturday

    Saturday: A chance of showers and thunderstorms. Sunny, with a high near 72. Breezy, with a southwest wind 10 to 20 mph becoming northwest in the afternoon. Chance of precipitation is 50%.

    High: 72 °F

    Chance
    Showers and
    Breezy then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55. North wind 10 to 15 mph.

    Low: 55 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 63. Northeast wind 5 to 15 mph.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57. East wind around 5 mph.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 55. West wind around 10 mph.
New Year's Day
Sunny, with a high near 67. Northwest wind 5 to 10 mph.
Thursday Night
Increasing clouds, with a low around 62. Southwest wind around 10 mph.
Friday
Mostly sunny, with a high near 72. Breezy, with a southwest wind 15 to 20 mph.
Friday Night
A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Partly cloudy, with a low around 67. Breezy, with a southwest wind around 20 mph. Chance of precipitation is 60%.
Saturday
A chance of showers and thunderstorms. Sunny, with a high near 72. Breezy, with a southwest wind 10 to 20 mph becoming northwest in the afternoon. Chance of precipitation is 50%.
Saturday Night
Mostly clear, with a low around 55. North wind 10 to 15 mph.
Sunday
Sunny, with a high near 63. Northeast wind 5 to 15 mph.
Sunday Night
Mostly clear, with a low around 57. East wind around 5 mph.
Monday
Sunny, with a high near 66. Southeast wind around 5 mph.
Monday Night
Mostly clear, with a low around 62. South wind around 5 mph.
Tuesday
Mostly sunny, with a high near 69. South wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 64. South wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 70. South wind 5 to 10 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:
11:30 pm CST Dec 31, 2025
Forecast Valid:
1am CST Jan 1, 2026-6pm CST Jan 7, 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