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

64°F

18°C

Humidity 84%
Wind Speed S 6 mph
Barometer 30.07 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 23 Mar 12:35 am CDT
Extended Forecast for

15 Miles WSW Grand Isle LA

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 64. Southwest wind around 5 mph.

    Low: 64 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 77. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62. Southwest wind around 5 mph.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 76. Northwest wind around 5 mph becoming southeast in the afternoon.

    High: 76 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 62. Southwest wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 76. Calm wind becoming south around 5 mph in the afternoon.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 63. South wind around 5 mph becoming calm.

    Low: 63 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 77. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65. Southeast wind around 5 mph becoming calm.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 64. Southwest wind around 5 mph.
Monday
Sunny, with a high near 77. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 62. Southwest wind around 5 mph.
Tuesday
Sunny, with a high near 76. Northwest wind around 5 mph becoming southeast in the afternoon.
Tuesday Night
Partly cloudy, with a low around 62. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 76. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 63. South wind around 5 mph becoming calm.
Thursday
Sunny, with a high near 77. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 65. Southeast wind around 5 mph becoming calm.
Friday
Sunny, with a high near 78. Calm wind becoming southeast around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 60. Calm wind becoming north around 5 mph after midnight.
Saturday
Sunny, with a high near 74. Northeast wind around 10 mph.
Saturday Night
Mostly clear, with a low around 60. Northeast wind 5 to 10 mph.
Sunday
Sunny, with a high near 74. East wind 10 to 15 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
15 Miles WSW Grand Isle LA
 29.13°N 90.2°W
Last Update:
6:38 pm CDT Mar 22, 2026
Forecast Valid:
12am CDT Mar 23, 2026-6pm CDT Mar 29, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation