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

75°F

24°C

Humidity 76%
Wind Speed S 8 mph
Barometer 29.96 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 18 Apr 8:15 am CDT
Extended Forecast for

15 Miles WSW Grand Isle LA

  • Today

    Today: Partly sunny, with a high near 81. South wind 5 to 10 mph.

    High: 81 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61. South wind 5 to 10 mph becoming north after midnight.

    Low: 61 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 74. Breezy, with a northeast wind 15 to 20 mph.

    High: 74 °F

    Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 62. Northeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 62 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 75. East wind around 15 mph, with gusts as high as 25 mph.

    High: 75 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 65. East wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 65 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 77. East wind 10 to 15 mph.

    High: 77 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 65. East wind 5 to 10 mph.

    Low: 65 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers. Mostly cloudy, with a high near 77. East wind 5 to 15 mph.

    High: 77 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Partly sunny, with a high near 81. South wind 5 to 10 mph.
Tonight
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61. South wind 5 to 10 mph becoming north after midnight.
Sunday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 74. Breezy, with a northeast wind 15 to 20 mph.
Sunday Night
Partly cloudy, with a low around 62. Northeast wind around 15 mph, with gusts as high as 25 mph.
Monday
Partly sunny, with a high near 75. East wind around 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 65. East wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 77. East wind 10 to 15 mph.
Tuesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 65. East wind 5 to 10 mph.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 77. East wind 5 to 15 mph.
Wednesday Night
Partly cloudy, with a low around 66. Southeast wind around 10 mph.
Thursday
Sunny, with a high near 79. Southeast wind 5 to 15 mph.
Thursday Night
Partly cloudy, with a low around 68. Southeast wind around 10 mph.
Friday
Mostly sunny, with a high near 81. South wind around 10 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
15 Miles WSW Grand Isle LA
 29.13°N 90.2°W
Last Update:
2:06 am CDT Apr 18, 2026
Forecast Valid:
8am CDT Apr 18, 2026-6pm CDT Apr 24, 2026
 
Forecast Discussion
 
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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