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

Severe Weather and Flooding Threats for the Central U.S.; Fire Weather Concerns for the Western U.S.

Severe weather and flooding threats continue for portions of the central U.S., with impactful flash flooding possible from southern Kansas to southwestern Missouri. Extremely Critical fire weather conditions will develop across the Great Basin and Southwest on Friday, with dry and windy conditions through the weekend. Dangerous heat will increase across the southern and central U.S. this weekend. Read More >

Current conditions at

Galliano, South Lafourche Airport (KGAO)

Lat: 29.44°NLon: 90.26°WElev: 0ft.

Fair

85°F

29°C

Humidity 66%
Wind Speed SW 6 mph
Barometer 30.02 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 25 Jun 7:15 pm CDT
Extended Forecast for

Grand Isle LA

  • Tonight

    Tonight: Mostly clear, with a low around 83. South wind 5 to 10 mph.

    Low: 83 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87. South wind 5 to 10 mph.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 84. South wind around 10 mph.

    Low: 84 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 88. South wind around 10 mph.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 83. South wind around 5 mph.

    Low: 83 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 87. South wind around 5 mph.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 83. South wind around 5 mph.

    Low: 83 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 88. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 83. South wind around 5 mph becoming southwest after midnight.

    Low: 83 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 83. South wind 5 to 10 mph.
Friday
Sunny, with a high near 87. South wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 84. South wind around 10 mph.
Saturday
Sunny, with a high near 88. South wind around 10 mph.
Saturday Night
Mostly clear, with a low around 83. South wind around 5 mph.
Sunday
Sunny, with a high near 87. South wind around 5 mph.
Sunday Night
Clear, with a low around 83. South wind around 5 mph.
Monday
Sunny, with a high near 88. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 83. South wind around 5 mph becoming southwest after midnight.
Tuesday
A slight chance of showers and thunderstorms. Sunny, with a high near 88. Northwest wind around 5 mph becoming southeast in the afternoon.
Tuesday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 82. Southeast wind around 5 mph.
Wednesday
A chance of showers and thunderstorms. Sunny, with a high near 88. Northeast wind around 5 mph becoming southeast in the afternoon.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Southeast wind around 5 mph.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Northeast wind around 5 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:
6:15 pm CDT Jun 25, 2026
Forecast Valid:
7pm CDT Jun 25, 2026-6pm CDT Jul 2, 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