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.

Mostly Cloudy

66°F

19°C

Humidity 71%
Wind Speed N 12 G 21 mph
Barometer 30.15 in
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 5 Apr 9:55 pm CDT
Extended Forecast for

15 Miles WSW Grand Isle LA

  • Tonight

    Tonight: A chance of showers before 1am, then a chance of showers after 2am. Cloudy, with a low around 58. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 58 °F

    Chance
    Showers

  • Monday

    Monday: Showers likely, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 70. Breezy, with a northeast wind 15 to 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 70 °F

    Breezy.
    Showers
    Likely then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 59. Northeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 75. East wind 10 to 15 mph.

    High: 75 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 1am. Partly cloudy, with a low around 63. East wind 10 to 15 mph.

    Low: 63 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 75. Breezy, with an east wind 15 to 25 mph. Chance of precipitation is 70%.

    High: 75 °F

    Showers
    Likely and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    Low: 65 °F

    Showers
    Likely

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 77. East wind around 15 mph.

    High: 77 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. East wind 10 to 15 mph.

    Low: 66 °F

    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers before 1am, then a chance of showers after 2am. Cloudy, with a low around 58. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers likely, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 70. Breezy, with a northeast wind 15 to 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Mostly clear, with a low around 59. Northeast wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 75. East wind 10 to 15 mph.
Tuesday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 63. East wind 10 to 15 mph.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 75. Breezy, with an east wind 15 to 25 mph. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 77. East wind around 15 mph.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. East wind 10 to 15 mph.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 77. East wind 10 to 15 mph.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66. East wind around 10 mph.
Saturday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 78. East wind 10 to 15 mph.
Saturday Night
Partly cloudy, with a low around 66. Southeast wind around 10 mph.
Sunday
Mostly sunny, with a high near 79. East wind 10 to 15 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
15 Miles WSW Grand Isle LA
 29.13°N 90.2°W
Last Update:
5:32 pm CDT Apr 5, 2026
Forecast Valid:
10pm CDT Apr 5, 2026-6pm CDT Apr 12, 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