National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Galliano, South Lafourche Airport (KGAO)

Lat: 29.44°NLon: 90.26°WElev: 0ft.

Fair

77°F

25°C

Humidity 83%
Wind Speed SE 7 mph
Barometer 30.05 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 15 Oct 1:15 am CDT
Extended Forecast for

Grand Isle LA

Dense Fog Advisory until October 15, 11:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until October 15, 11:00am

    NOW until 11:00am Thu

    Dense Fog Advisory

  • Overnight

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 82. East wind around 10 mph.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 77. East wind 5 to 10 mph.

    Low: 77 °F

    Increasing
    Clouds

  • Friday

    Friday: A chance of showers and thunderstorms before noon, then a chance of showers after 1pm. Partly sunny, with a high near 82. Northeast wind 5 to 10 mph. Chance of precipitation is 40%.

    High: 82 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 66. Windy, with an east wind 5 to 10 mph becoming north 25 to 35 mph.

    Low: 66 °F

    Mostly Cloudy
    then Partly
    Cloudy and
    Windy

  • Saturday

    Saturday: Mostly sunny, with a high near 73. Windy, with a northeast wind 25 to 35 mph.

    High: 73 °F

    Mostly Sunny
    and Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 68. Windy, with a northeast wind 25 to 30 mph.

    Low: 68 °F

    Mostly Clear
    and Windy

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 76. Windy, with a northeast wind 25 to 30 mph.

    High: 76 °F

    Mostly Sunny
    and Breezy
    then Slight
    Chance
    Showers and
    Windy

Detailed Forecast

Overnight
Mostly clear, with a low around 77. Southeast wind around 10 mph.
Thursday
Sunny, with a high near 82. East wind around 10 mph.
Thursday Night
Increasing clouds, with a low around 77. East wind 5 to 10 mph.
Friday
A chance of showers and thunderstorms before noon, then a chance of showers after 1pm. Partly sunny, with a high near 82. Northeast wind 5 to 10 mph. Chance of precipitation is 40%.
Friday Night
Mostly cloudy, with a low around 66. Windy, with an east wind 5 to 10 mph becoming north 25 to 35 mph.
Saturday
Mostly sunny, with a high near 73. Windy, with a northeast wind 25 to 35 mph.
Saturday Night
Mostly clear, with a low around 68. Windy, with a northeast wind 25 to 30 mph.
Sunday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 76. Windy, with a northeast wind 25 to 30 mph.
Sunday Night
Mostly cloudy, with a low around 71. Windy, with an east wind 25 to 30 mph.
Monday
A chance of showers. Partly sunny, with a high near 77. Windy, with an east wind around 30 mph.
Monday Night
Partly cloudy, with a low around 72. Breezy, with an east wind 20 to 25 mph.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 78. Breezy, with an east wind 20 to 25 mph.
Tuesday Night
Partly cloudy, with a low around 73. Breezy, with an east wind around 20 mph.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 78. Breezy, with a northeast wind around 20 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:
1:01 am CDT Oct 15, 2026
Forecast Valid:
1am CDT Oct 15, 2026-6pm CDT Oct 21, 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