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.

Partly Cloudy

62°F

17°C

Humidity 58%
Wind Speed N 18 G 28 mph
Barometer 30.20 in
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 12 Mar 1:35 pm CDT
Extended Forecast for

4 Miles WSW Grand Isle LA

  • This Afternoon

    This Afternoon: Partly sunny, then gradually becoming sunny, with a high near 66. Windy, with a north wind 25 to 30 mph.

    High: 66 °F

    Becoming
    Sunny and
    Windy

  • Tonight

    Tonight: Mostly clear, with a low around 59. Breezy, with a northeast wind 20 to 25 mph decreasing to 10 to 15 mph after midnight.

    Low: 59 °F

    Mostly Clear
    and Breezy

  • Friday

    Friday: Sunny, with a high near 68. East wind around 5 mph.

    High: 68 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64. Calm wind becoming southeast around 5 mph after midnight.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 72. Southeast wind 5 to 10 mph.

    High: 72 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67. Southeast wind 5 to 10 mph.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 75. South wind 10 to 15 mph.

    High: 75 °F

    Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 52. Breezy, with a south wind 15 to 20 mph becoming northwest after midnight. Chance of precipitation is 70%.

    Low: 52 °F

    Chance
    Showers then
    Showers
    Likely and
    Breezy

  • Monday

    Monday: A slight chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 60. Windy, with a north wind 20 to 30 mph.

    High: 60 °F

    Slight Chance
    T-storms and
    Windy

Detailed Forecast

This Afternoon
Partly sunny, then gradually becoming sunny, with a high near 66. Windy, with a north wind 25 to 30 mph.
Tonight
Mostly clear, with a low around 59. Breezy, with a northeast wind 20 to 25 mph decreasing to 10 to 15 mph after midnight.
Friday
Sunny, with a high near 68. East wind around 5 mph.
Friday Night
Mostly clear, with a low around 64. Calm wind becoming southeast around 5 mph after midnight.
Saturday
Mostly sunny, with a high near 72. Southeast wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 67. Southeast wind 5 to 10 mph.
Sunday
Sunny, with a high near 75. South wind 10 to 15 mph.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 52. Breezy, with a south wind 15 to 20 mph becoming northwest after midnight. Chance of precipitation is 70%.
Monday
A slight chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 60. Windy, with a north wind 20 to 30 mph.
Monday Night
Partly cloudy, with a low around 47. Breezy, with a north wind 20 to 25 mph.
Tuesday
Partly sunny, with a high near 58. Breezy, with a north wind 15 to 20 mph.
Tuesday Night
Mostly clear, with a low around 54. Northeast wind around 10 mph.
Wednesday
Sunny, with a high near 65. East wind around 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Grand Isle LA
 29.21°N 90.04°W
Last Update:
12:31 pm CDT Mar 12, 2026
Forecast Valid:
1pm CDT Mar 12, 2026-6pm CDT Mar 18, 2026
 
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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