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

67°F

19°C

Humidity 55%
Wind Speed NE 5 mph
Barometer 30.28 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 29 Mar 12:15 am CDT
Extended Forecast for

15 Miles WSW Grand Isle LA

  • Overnight

    Overnight: Mostly clear, with a low around 65. Northeast wind around 5 mph.

    Low: 65 °F

    Mostly Clear

  • Sunday

    Sunday: A 30 percent chance of showers, mainly between 11am and 2pm. Mostly sunny, with a high near 74. East wind 5 to 15 mph.

    High: 74 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A 20 percent chance of showers. Partly cloudy, with a low around 68. East wind around 10 mph, with gusts as high as 20 mph.

    Low: 68 °F

    Slight Chance
    Showers

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 76. Southeast wind around 10 mph. Chance of precipitation is 30%.

    High: 76 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers before 10pm. Partly cloudy, with a low around 70. Southeast wind around 5 mph.

    Low: 70 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 79. Southeast wind 5 to 10 mph.

    High: 79 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 67. Southeast wind around 5 mph.

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81. Southeast wind 5 to 10 mph.

    High: 81 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 67. Southeast wind around 5 mph.

    Low: 67 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 65. Northeast wind around 5 mph.
Sunday
A 30 percent chance of showers, mainly between 11am and 2pm. Mostly sunny, with a high near 74. East wind 5 to 15 mph.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 68. East wind around 10 mph, with gusts as high as 20 mph.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 76. Southeast wind around 10 mph. Chance of precipitation is 30%.
Monday Night
A 20 percent chance of showers before 10pm. Partly cloudy, with a low around 70. Southeast wind around 5 mph.
Tuesday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 79. Southeast wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 67. Southeast wind around 5 mph.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81. Southeast wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 67. Southeast wind around 5 mph.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 80. Southeast wind 5 to 15 mph.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 67. Southeast wind 5 to 10 mph.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Southeast wind 10 to 15 mph.
Friday Night
Mostly cloudy, with a low around 67. Southeast wind around 10 mph.
Saturday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 80. Southeast 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:
15 Miles WSW Grand Isle LA
 29.13°N 90.2°W
Last Update:
5:23 pm CDT Mar 28, 2026
Forecast Valid:
12am CDT Mar 29, 2026-6pm CDT Apr 4, 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