Current conditions at

Galliano, South Lafourche Airport (KGAO)

Lat: 29.44°NLon: 90.26°WElev: 0ft.

Fair

84°F

29°C

Humidity 79%
Wind Speed SW 8 mph
Barometer 29.83 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 2 Aug 5:35 am CDT
Extended Forecast for

Grand Isle LA

  • Overnight

    Overnight: Showers and thunderstorms likely. Some of the storms could produce heavy rainfall.  Partly cloudy, with a steady temperature around 84. Breezy, with a west wind around 20 mph.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 84 °F

    Heavy Rain
    and Breezy

  • Sunday

    Sunday: Showers and thunderstorms, mainly before 1pm. Some of the storms could produce heavy rainfall.  High near 88. Breezy, with a west wind 15 to 20 mph.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 88 °F

    Heavy Rain
    and Breezy
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms, mainly between 10pm and 11pm.  Partly cloudy, with a low around 82. West wind 10 to 15 mph.

    Low: 82 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 89. Northwest wind around 5 mph becoming southwest in the afternoon.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 82. Southwest wind around 10 mph.

    Low: 82 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. West wind around 5 mph.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 82. Southwest wind around 5 mph.

    Low: 82 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. South wind around 5 mph.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms after 1am.  Mostly clear, with a low around 82. South wind around 5 mph.

    Low: 82 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

Detailed Forecast

Overnight
Showers and thunderstorms likely. Some of the storms could produce heavy rainfall. Partly cloudy, with a steady temperature around 84. Breezy, with a west wind around 20 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and thunderstorms, mainly before 1pm. Some of the storms could produce heavy rainfall. High near 88. Breezy, with a west wind 15 to 20 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A 20 percent chance of showers and thunderstorms, mainly between 10pm and 11pm. Partly cloudy, with a low around 82. West wind 10 to 15 mph.
Monday
Sunny, with a high near 89. Northwest wind around 5 mph becoming southwest in the afternoon.
Monday Night
Mostly clear, with a low around 82. Southwest wind around 10 mph.
Tuesday
Sunny, with a high near 89. West wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 82. Southwest wind around 5 mph.
Wednesday
Sunny, with a high near 88. South wind around 5 mph.
Wednesday Night
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 82. South wind around 5 mph.
Thursday
A slight chance of showers and thunderstorms before 1pm. Sunny, with a high near 88. Southeast wind around 5 mph.
Thursday Night
Mostly clear, with a low around 82. Southeast wind around 5 mph.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87. East wind 5 to 10 mph.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 82. Southeast wind 5 to 10 mph.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. East wind around 5 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Isle LA
 29.23°N 89.99°W
2:01 am CDT Aug 2, 2026
5am CDT Aug 2, 2026-6pm CDT Aug 8, 2026
 
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Additional Resources

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