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

43°F

6°C

Humidity 90%
Wind Speed Calm
Barometer 30.14 in
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 13 Mar 4:55 am CDT
Extended Forecast for

15 Miles WSW Grand Isle LA

  • Today

    Today: Sunny, with a high near 68. Northeast wind around 5 mph becoming southeast in the afternoon.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. Calm wind becoming southeast around 5 mph.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 73. Southeast wind 5 to 10 mph.

    High: 73 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 65. Southeast wind around 5 mph.

    Low: 65 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76. South wind 5 to 10 mph.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers before 1am, then a chance of showers and thunderstorms between 1am and 4am, then showers and possibly a thunderstorm after 4am. Low around 50. South wind 10 to 15 mph becoming west after midnight. Chance of precipitation is 80%.

    Low: 50 °F

    Slight Chance
    Showers then
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms between 7am and 1pm. High near 61. Breezy, with a north wind 20 to 25 mph. Chance of precipitation is 80%.

    High: 61 °F

    Breezy.
    Showers then
    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43. North wind around 15 mph.

    Low: 43 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 58. North wind 10 to 15 mph.

    High: 58 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 68. Northeast wind around 5 mph becoming southeast in the afternoon.
Tonight
Mostly clear, with a low around 59. Calm wind becoming southeast around 5 mph.
Saturday
Sunny, with a high near 73. Southeast wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 65. Southeast wind around 5 mph.
Sunday
Sunny, with a high near 76. South wind 5 to 10 mph.
Sunday Night
A slight chance of showers before 1am, then a chance of showers and thunderstorms between 1am and 4am, then showers and possibly a thunderstorm after 4am. Low around 50. South wind 10 to 15 mph becoming west after midnight. Chance of precipitation is 80%.
Monday
Showers and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms between 7am and 1pm. High near 61. Breezy, with a north wind 20 to 25 mph. Chance of precipitation is 80%.
Monday Night
Partly cloudy, with a low around 43. North wind around 15 mph.
Tuesday
Partly sunny, with a high near 58. North wind 10 to 15 mph.
Tuesday Night
Mostly clear, with a low around 49. Northeast wind around 5 mph.
Wednesday
Mostly sunny, with a high near 65. Northeast wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 55. Southeast wind around 5 mph.
Thursday
Sunny, with a high near 69. East wind around 5 mph becoming south in the afternoon.
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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:
12:31 am CDT Mar 13, 2026
Forecast Valid:
5am CDT Mar 13, 2026-6pm CDT Mar 19, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation