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.

Mostly Cloudy

79°F

26°C

Humidity 65%
Wind Speed E 5 mph
Barometer 30.05 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 20 Nov 2:35 pm CST
Extended Forecast for

13 Miles WSW Grand Isle LA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 78. Southeast wind 5 to 10 mph.

    High: 78 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 5am. Increasing clouds, with a low around 67. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 67 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly before 2pm. Partly sunny, with a high near 80. South wind 5 to 10 mph.

    High: 80 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 65. Southwest wind around 5 mph.

    Low: 65 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming west around 5 mph.

    High: 78 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 63. Calm wind becoming west around 5 mph.

    Low: 63 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 77. North wind around 5 mph becoming east in the afternoon.

    High: 77 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 64. Southeast wind around 5 mph.

    Low: 64 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79. Southeast wind 5 to 10 mph.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 78. Southeast wind 5 to 10 mph.
Tonight
A 30 percent chance of showers, mainly after 5am. Increasing clouds, with a low around 67. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly before 2pm. Partly sunny, with a high near 80. South wind 5 to 10 mph.
Friday Night
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 65. Southwest wind around 5 mph.
Saturday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming west around 5 mph.
Saturday Night
Partly cloudy, with a low around 63. Calm wind becoming west around 5 mph.
Sunday
Mostly sunny, with a high near 77. North wind around 5 mph becoming east in the afternoon.
Sunday Night
Mostly cloudy, with a low around 64. Southeast wind around 5 mph.
Monday
Mostly sunny, with a high near 79. Southeast wind 5 to 10 mph.
Monday Night
A chance of showers, mainly after midnight. Mostly cloudy, with a low around 65. Southeast wind 5 to 10 mph.
Tuesday
A chance of showers. Mostly sunny, with a high near 79. South wind 5 to 10 mph.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 62. South wind around 5 mph becoming north after midnight.
Wednesday
A chance of showers. Partly sunny, with a high near 76. North wind 5 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
13 Miles WSW Grand Isle LA
 29.15°N 90.17°W
Last Update:
11:32 am CST Nov 20, 2025
Forecast Valid:
2pm CST Nov 20, 2025-6pm CST Nov 26, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation