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

69°F

21°C

Humidity 72%
Wind Speed S 12 mph
Barometer 29.91 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 25 Feb 4:35 pm CST
Extended Forecast for

15 Miles WSW Grand Isle LA

  • Tonight

    Tonight: Partly cloudy, with a steady temperature around 65. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 65 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 74. South wind around 10 mph, with gusts as high as 20 mph.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers. Patchy fog between 9pm and 10pm. Otherwise, mostly cloudy, with a low around 62. South wind around 5 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 62 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 9am. Mostly sunny, with a high near 74. Southwest wind 5 to 10 mph becoming northeast in the afternoon. Chance of precipitation is 50%.

    High: 74 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 59. Calm wind becoming northeast around 5 mph after midnight.

    Low: 59 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 74. Northeast wind around 5 mph.

    High: 74 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60. East wind around 5 mph.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 74. East wind 5 to 10 mph.

    High: 74 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a steady temperature around 65. South wind around 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 74. South wind around 10 mph, with gusts as high as 20 mph.
Thursday Night
A 50 percent chance of showers. Patchy fog between 9pm and 10pm. Otherwise, mostly cloudy, with a low around 62. South wind around 5 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of showers, with thunderstorms also possible after 9am. Mostly sunny, with a high near 74. Southwest wind 5 to 10 mph becoming northeast in the afternoon. Chance of precipitation is 50%.
Friday Night
Partly cloudy, with a low around 59. Calm wind becoming northeast around 5 mph after midnight.
Saturday
Mostly sunny, with a high near 74. Northeast wind around 5 mph.
Saturday Night
Mostly clear, with a low around 60. East wind around 5 mph.
Sunday
Mostly sunny, with a high near 74. East wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 61. East wind around 5 mph.
Monday
A slight chance of showers after noon. Sunny, with a high near 75. Southeast wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 61. East wind around 5 mph.
Tuesday
Sunny, with a high near 74. East wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 61. East wind around 5 mph.
Wednesday
Mostly sunny, with a high near 74. East wind 5 to 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:
2:32 pm CST Feb 25, 2026
Forecast Valid:
4pm CST Feb 25, 2026-6pm CST Mar 4, 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