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

74°F

23°C

Humidity 81%
Wind Speed SE 10 mph
Barometer 30.04 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 20 Nov 10:15 pm CST
Extended Forecast for

13 Miles WSW Grand Isle LA

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 5am. Mostly cloudy, with a low around 67. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 67 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly before 2pm. Mostly sunny, with a high near 80. South wind 5 to 10 mph.

    High: 80 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming west around 5 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 63. Calm wind becoming north around 5 mph after midnight.

    Low: 63 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 77. Northeast wind around 5 mph.

    High: 77 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 64. East wind around 5 mph.

    Low: 64 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79. Southeast wind 5 to 10 mph.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A chance of showers, mainly after midnight. Mostly cloudy, with a low around 65. South wind 5 to 10 mph.

    Low: 65 °F

    Chance
    Showers

Detailed Forecast

Tonight
A 30 percent chance of showers, mainly after 5am. Mostly cloudy, with a low around 67. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly before 2pm. Mostly sunny, with a high near 80. South wind 5 to 10 mph.
Friday Night
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 65. Calm wind.
Saturday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 63. Calm wind becoming north around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 77. Northeast wind around 5 mph.
Sunday Night
Mostly cloudy, with a low around 64. East wind around 5 mph.
Monday
Mostly sunny, with a high near 79. Southeast wind 5 to 10 mph.
Monday Night
A chance of showers, mainly after midnight. Mostly cloudy, with a low around 65. South wind 5 to 10 mph.
Tuesday
A chance of showers, mainly before noon. Mostly sunny, with a high near 79. South wind 5 to 10 mph.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 62. South wind around 5 mph becoming north after midnight.
Wednesday
A chance of showers. Partly sunny, with a high near 76. North wind 5 to 10 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 53. North wind 5 to 10 mph.
Thanksgiving Day
A slight chance of showers. Partly sunny, with a high near 68. North wind 10 to 15 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
13 Miles WSW Grand Isle LA
 29.15°N 90.17°W
Last Update:
9:21 pm CST Nov 20, 2025
Forecast Valid:
10pm CST Nov 20, 2025-6pm CST Nov 27, 2025
 
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