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

71°F

22°C

Humidity 57%
Wind Speed E 7 mph
Barometer 30.10 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 14 Mar 11:55 am CDT
Extended Forecast for

15 Miles WSW Grand Isle LA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 75. Southeast wind around 5 mph.

    High: 75 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 65. Southeast wind around 5 mph.

    Low: 65 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 79. South wind 5 to 15 mph.

    High: 79 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Patchy fog between 10pm and 4am. Low around 49. South wind 10 to 15 mph becoming northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%.

    Low: 49 °F

    Chance
    T-storms and
    Patchy Fog
    then Showers
    and Patchy
    Fog

  • Monday

    Monday: A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 1pm. Partly sunny, with a high near 60. Breezy, with a north wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 20%.

    High: 60 °F

    Breezy.
    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41. North wind around 15 mph, with gusts as high as 30 mph.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 57. North wind 10 to 15 mph.

    High: 57 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47. Northeast wind around 5 mph.

    Low: 47 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 65. Northeast wind 5 to 10 mph.

    High: 65 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 75. Southeast wind around 5 mph.
Tonight
Partly cloudy, with a low around 65. Southeast wind around 5 mph.
Sunday
Mostly sunny, with a high near 79. South wind 5 to 15 mph.
Sunday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Patchy fog between 10pm and 4am. Low around 49. South wind 10 to 15 mph becoming northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%.
Monday
A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 1pm. Partly sunny, with a high near 60. Breezy, with a north wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 20%.
Monday Night
Mostly cloudy, with a low around 41. North wind around 15 mph, with gusts as high as 30 mph.
Tuesday
Mostly sunny, with a high near 57. North wind 10 to 15 mph.
Tuesday Night
Mostly clear, with a low around 47. Northeast wind around 5 mph.
Wednesday
Sunny, with a high near 65. Northeast wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 55. East wind around 5 mph.
Thursday
Sunny, with a high near 72. Northeast wind around 5 mph becoming south in the afternoon.
Thursday Night
Mostly clear, with a low around 60. South wind around 5 mph becoming west after midnight.
Friday
Sunny, with a high near 74. Northwest wind 5 to 10 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:
12:02 pm CDT Mar 14, 2026
Forecast Valid:
12pm CDT Mar 14, 2026-6pm CDT Mar 20, 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