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.

Overcast and Breezy

58°F

14°C

Humidity 78%
Wind Speed N 21 G 30 mph
Barometer 30.17 in
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 12 Mar 8:35 am CDT
Extended Forecast for

15 Miles WSW Grand Isle LA

  • Today

    Today: Partly sunny, then gradually becoming sunny, with a high near 69. North wind around 15 mph, with gusts as high as 35 mph.

    High: 69 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 54. Northeast wind 5 to 10 mph.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 72. Northeast wind around 5 mph becoming southeast in the afternoon.

    High: 72 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. Calm wind becoming southeast around 5 mph.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 76. East wind 5 to 10 mph.

    High: 76 °F

    Sunny

  • Saturday Night

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

    Low: 64 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 78. Southwest wind 5 to 10 mph.

    High: 78 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 53. South wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph.

    Low: 53 °F

    Partly Cloudy
    then Chance
    T-storms

  • Monday

    Monday: A slight chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 65. Breezy, with a north wind 15 to 20 mph.

    High: 65 °F

    Slight Chance
    T-storms and
    Breezy

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny, with a high near 69. North wind around 15 mph, with gusts as high as 35 mph.
Tonight
Mostly clear, with a low around 54. Northeast wind 5 to 10 mph.
Friday
Sunny, with a high near 72. Northeast wind around 5 mph becoming southeast in the afternoon.
Friday Night
Mostly clear, with a low around 60. Calm wind becoming southeast around 5 mph.
Saturday
Sunny, with a high near 76. East wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 64. East wind around 5 mph.
Sunday
Mostly sunny, with a high near 78. Southwest wind 5 to 10 mph.
Sunday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 53. South wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph.
Monday
A slight chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 65. Breezy, with a north wind 15 to 20 mph.
Monday Night
Mostly cloudy, with a low around 47. North wind around 15 mph.
Tuesday
Mostly sunny, with a high near 63. Northeast wind 10 to 15 mph.
Tuesday Night
Mostly clear, with a low around 52. East wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 69. 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:
6:19 am CDT Mar 12, 2026
Forecast Valid:
8am CDT Mar 12, 2026-6pm CDT Mar 18, 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