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

46°F

8°C

Humidity 57%
Wind Speed NE 5 mph
Barometer 30.42 in
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 12 Jan 4:55 am CST
Extended Forecast for

Grand Isle LA

  • Today

    Today: Partly sunny, with a high near 55. Northeast wind 10 to 15 mph.

    High: 55 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 51. Northeast wind around 10 mph.

    Low: 51 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 59. Northeast wind 5 to 10 mph becoming light north in the afternoon.

    High: 59 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 55. Light and variable wind becoming west 5 to 10 mph after midnight.

    Low: 55 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 64. Breezy, with a west wind 10 to 20 mph.

    High: 64 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43. Breezy, with a north wind 20 to 25 mph.

    Low: 43 °F

    Partly Cloudy
    and Breezy

  • Thursday

    Thursday: Sunny, with a high near 50. Breezy, with a north wind 20 to 25 mph decreasing to 15 to 20 mph in the afternoon.

    High: 50 °F

    Sunny and
    Breezy then
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. North wind 5 to 15 mph.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 59. North wind 5 to 10 mph becoming south in the afternoon.

    High: 59 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 55. Northeast wind 10 to 15 mph.
Tonight
Partly cloudy, with a low around 51. Northeast wind around 10 mph.
Tuesday
Mostly sunny, with a high near 59. Northeast wind 5 to 10 mph becoming light north in the afternoon.
Tuesday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 55. Light and variable wind becoming west 5 to 10 mph after midnight.
Wednesday
Mostly sunny, with a high near 64. Breezy, with a west wind 10 to 20 mph.
Wednesday Night
Partly cloudy, with a low around 43. Breezy, with a north wind 20 to 25 mph.
Thursday
Sunny, with a high near 50. Breezy, with a north wind 20 to 25 mph decreasing to 15 to 20 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 44. North wind 5 to 15 mph.
Friday
Sunny, with a high near 59. North wind 5 to 10 mph becoming south in the afternoon.
Friday Night
Partly cloudy, with a low around 51. South wind 10 to 15 mph becoming northwest after midnight.
Saturday
Mostly sunny, with a high near 58. Northwest wind around 15 mph.
Saturday Night
Mostly clear, with a low around 46. Northwest wind around 15 mph.
Sunday
Sunny, with a high near 57. North wind 10 to 15 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:
11:31 pm CST Jan 11, 2026
Forecast Valid:
5am CST Jan 12, 2026-6pm CST Jan 18, 2026
 
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Additional Resources

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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