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.

Light Rain

57°F

14°C

Humidity 79%
Wind Speed NE 13 G 21 mph
Barometer 30.16 in
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 6 Apr 7:35 am CDT
Extended Forecast for

Grand Isle LA

  • Today

    Today: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 68. Breezy, with a northeast wind 20 to 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 68 °F

    Breezy.
    Showers
    Likely then
    Chance
    Showers

  • Tonight

    Tonight: Mostly clear, with a low around 64. Breezy, with a northeast wind 15 to 20 mph.

    Low: 64 °F

    Mostly Clear
    and Breezy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 72. Breezy, with an east wind around 20 mph.

    High: 72 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 67. Breezy, with an east wind around 20 mph.

    Low: 67 °F

    Breezy.
    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 72. Breezy, with an east wind around 25 mph. Chance of precipitation is 70%.

    High: 72 °F

    Showers
    Likely and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Windy, with an east wind 25 to 30 mph. Chance of precipitation is 70%.

    Low: 67 °F

    Showers
    Likely and
    Windy

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 73. Breezy, with an east wind around 25 mph.

    High: 73 °F

    Breezy.
    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Breezy, with an east wind around 20 mph.

    Low: 69 °F

    Chance
    Showers and
    Breezy

  • Friday

    Friday: A chance of showers and thunderstorms. Partly sunny, with a high near 74. Breezy, with an east wind 15 to 20 mph.

    High: 74 °F

    Chance
    Showers and
    Breezy

Detailed Forecast

Today
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 68. Breezy, with a northeast wind 20 to 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Mostly clear, with a low around 64. Breezy, with a northeast wind 15 to 20 mph.
Tuesday
Mostly sunny, with a high near 72. Breezy, with an east wind around 20 mph.
Tuesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 67. Breezy, with an east wind around 20 mph.
Wednesday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 72. Breezy, with an east wind around 25 mph. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Windy, with an east wind 25 to 30 mph. Chance of precipitation is 70%.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 73. Breezy, with an east wind around 25 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Breezy, with an east wind around 20 mph.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 74. Breezy, with an east wind 15 to 20 mph.
Friday Night
A slight chance of showers. Mostly cloudy, with a low around 69. East wind around 15 mph.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 75. East wind around 15 mph.
Saturday Night
Partly cloudy, with a low around 70. East wind around 15 mph.
Sunday
Sunny, with a high near 76. Southeast wind around 15 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Isle LA
 29.23°N 89.99°W
Last Update:
2:02 am CDT Apr 6, 2026
Forecast Valid:
7am CDT Apr 6, 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