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

59°F

15°C

Humidity 46%
Wind Speed N 3 mph
Barometer 30.18 in
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 12 Mar 8:55 pm CDT
Extended Forecast for

15 Miles WSW Grand Isle LA

  • Tonight

    Tonight: Mostly clear, with a low around 53. Northeast wind 10 to 15 mph.

    Low: 53 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 69. Northeast wind 5 to 10 mph becoming southeast in the afternoon.

    High: 69 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. Southeast wind around 5 mph.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 76. Southeast wind 5 to 10 mph.

    High: 76 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64. Southeast wind around 5 mph.

    Low: 64 °F

    Partly Cloudy

  • Sunday

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

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 50. South wind 10 to 15 mph becoming northwest after midnight. Chance of precipitation is 70%.

    Low: 50 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 61. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 61 °F

    Slight Chance
    T-storms and
    Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43. North wind around 15 mph, with gusts as high as 25 mph.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 53. Northeast wind 10 to 15 mph.
Friday
Sunny, with a high near 69. Northeast wind 5 to 10 mph becoming southeast in the afternoon.
Friday Night
Mostly clear, with a low around 60. Southeast wind around 5 mph.
Saturday
Mostly sunny, with a high near 76. Southeast wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 64. Southeast wind around 5 mph.
Sunday
Sunny, with a high near 79. South wind 5 to 15 mph.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 50. South wind 10 to 15 mph becoming northwest after midnight. Chance of precipitation is 70%.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 61. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night
Partly cloudy, with a low around 43. North wind around 15 mph, with gusts as high as 25 mph.
Tuesday
Partly sunny, with a high near 62. North wind around 15 mph.
Tuesday Night
Mostly clear, with a low around 50. East wind around 5 mph.
Wednesday
Sunny, with a high near 68. East wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 57. East wind around 5 mph.
Thursday
Mostly sunny, with a high near 72. East wind 5 to 10 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
15 Miles WSW Grand Isle LA
 29.13°N 90.2°W
Last Update:
6:20 pm CDT Mar 12, 2026
Forecast Valid:
9pm CDT Mar 12, 2026-6pm CDT Mar 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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