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

63°F

17°C

Humidity 83%
Wind Speed NW 5 mph
Barometer 30.12 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 11 Nov 12:55 am CST
Extended Forecast for

Grand Isle LA

  • Overnight

    Overnight: Mostly cloudy, with a low around 67. Calm wind becoming north around 5 mph.

    Low: 67 °F

    Mostly Cloudy

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 74. North wind 5 to 10 mph becoming east in the afternoon.

    High: 74 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 67. North wind 5 to 10 mph becoming west in the evening.

    Low: 67 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 75. North wind 10 to 15 mph.

    High: 75 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 61. North wind 10 to 15 mph.

    Low: 61 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 70. North wind 10 to 15 mph.

    High: 70 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. Northeast wind 10 to 15 mph.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 68. Northeast wind around 15 mph.

    High: 68 °F

    Sunny

  • Saturday Night

    Saturday Night: A chance of showers after midnight. Partly cloudy, with a low around 62. Breezy, with an east wind 15 to 20 mph.

    Low: 62 °F

    Partly Cloudy
    then Chance
    Showers and
    Breezy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 67. Calm wind becoming north around 5 mph.
Veterans Day
Partly sunny, with a high near 74. North wind 5 to 10 mph becoming east in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 67. North wind 5 to 10 mph becoming west in the evening.
Thursday
Partly sunny, with a high near 75. North wind 10 to 15 mph.
Thursday Night
Partly cloudy, with a low around 61. North wind 10 to 15 mph.
Friday
Sunny, with a high near 70. North wind 10 to 15 mph.
Friday Night
Mostly clear, with a low around 60. Northeast wind 10 to 15 mph.
Saturday
Sunny, with a high near 68. Northeast wind around 15 mph.
Saturday Night
A chance of showers after midnight. Partly cloudy, with a low around 62. Breezy, with an east wind 15 to 20 mph.
Sunday
A slight chance of showers before noon. Mostly sunny, with a high near 71. Breezy, with an east wind around 20 mph.
Sunday Night
A slight chance of showers. Mostly cloudy, with a low around 66. Breezy, with an east wind 20 to 25 mph.
Monday
A chance of showers. Partly sunny, with a high near 72. Windy, with a northeast wind 25 to 30 mph.
Monday Night
A chance of showers. Mostly cloudy, with a low around 63. Windy, with a northeast wind 25 to 30 mph.
Tuesday
Partly sunny, with a high near 69. Breezy, with a northeast wind 20 to 25 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Isle LA
 29.23°N 89.99°W
Last Update:
12:25 am CST Nov 11, 2026
Forecast Valid:
1am CST Nov 11, 2026-6pm CST Nov 17, 2026
 
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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