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

72°F

22°C

Humidity 92%
Wind Speed SE 5 mph
Barometer 30.09 in
Dewpoint 69°F (21°C)
Visibility 7.00 mi
Last update 10 Mar 5:55 am CDT
Extended Forecast for

15 Miles SW Grand Isle LA

  • Today

    Today: Patchy fog before 10am. Otherwise, partly sunny, with a high near 77. Southeast wind 5 to 10 mph.

    High: 77 °F

    Patchy Fog
    then Partly
    Sunny

  • Tonight

    Tonight: Patchy fog before midnight, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 68. Southeast wind 5 to 10 mph.

    Low: 68 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 78. South wind around 10 mph.

    High: 78 °F

    Patchy Fog
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 60. South wind 10 to 15 mph becoming west after midnight. Chance of precipitation is 90%.

    Low: 60 °F

    Showers
    Likely then
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Mostly sunny, with a high near 71. North wind around 15 mph. Chance of precipitation is 30%.

    High: 71 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57. North wind 10 to 15 mph.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 71. East wind 5 to 10 mph.

    High: 71 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61. East wind around 5 mph.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 75. East wind 5 to 10 mph.

    High: 75 °F

    Sunny

Detailed Forecast

Today
Patchy fog before 10am. Otherwise, partly sunny, with a high near 77. Southeast wind 5 to 10 mph.
Tonight
Patchy fog before midnight, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 68. Southeast wind 5 to 10 mph.
Wednesday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 78. South wind around 10 mph.
Wednesday Night
Showers and possibly a thunderstorm. Low around 60. South wind 10 to 15 mph becoming west after midnight. Chance of precipitation is 90%.
Thursday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Mostly sunny, with a high near 71. North wind around 15 mph. Chance of precipitation is 30%.
Thursday Night
Mostly clear, with a low around 57. North wind 10 to 15 mph.
Friday
Sunny, with a high near 71. East wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 61. East wind around 5 mph.
Saturday
Sunny, with a high near 75. East wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 65. Southeast wind around 5 mph.
Sunday
Mostly sunny, with a high near 77. South wind 5 to 10 mph.
Sunday Night
A slight chance of showers. Mostly cloudy, with a low around 56. Southwest wind 5 to 15 mph becoming north after midnight.
Monday
Mostly cloudy, with a high near 68. Breezy, with a north wind 20 to 25 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
15 Miles SW Grand Isle LA
 29.1°N 90.2°W
Last Update:
12:31 am CDT Mar 10, 2026
Forecast Valid:
6am CDT Mar 10, 2026-6pm CDT Mar 16, 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