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.

Fair

66°F

19°C

Humidity 53%
Wind Speed SE 3 mph
Barometer 30.07 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 13 Mar 6:15 pm CDT
Extended Forecast for

5 Miles WSW Grand Isle LA

  • Tonight

    Tonight: Mostly clear, with a low around 63. Calm wind becoming southeast around 5 mph.

    Low: 63 °F

    Mostly Clear

  • Saturday

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

    High: 72 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68. Southeast wind 5 to 10 mph.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 76. South wind 10 to 15 mph.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 50. Breezy, with a south wind 15 to 25 mph becoming northwest after midnight. Chance of precipitation is 70%.

    Low: 50 °F

    Slight Chance
    T-storms then
    Showers
    Likely and
    Breezy

  • Monday

    Monday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 59. Windy, with a north wind 25 to 30 mph.

    High: 59 °F

    Slight Chance
    Showers and
    Windy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 45. Breezy, with a north wind 20 to 25 mph.

    Low: 45 °F

    Mostly Cloudy
    and Breezy

  • Tuesday

    Tuesday: Partly sunny, with a high near 58. Northeast wind 10 to 15 mph.

    High: 58 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 52. Northeast wind 5 to 10 mph.

    Low: 52 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 63. Calm wind becoming southeast around 5 mph.
Saturday
Mostly sunny, with a high near 72. Southeast wind around 5 mph.
Saturday Night
Partly cloudy, with a low around 68. Southeast wind 5 to 10 mph.
Sunday
Sunny, with a high near 76. South wind 10 to 15 mph.
Sunday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 50. Breezy, with a south wind 15 to 25 mph becoming northwest after midnight. Chance of precipitation is 70%.
Monday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 59. Windy, with a north wind 25 to 30 mph.
Monday Night
Mostly cloudy, with a low around 45. Breezy, with a north wind 20 to 25 mph.
Tuesday
Partly sunny, with a high near 58. Northeast wind 10 to 15 mph.
Tuesday Night
Mostly clear, with a low around 52. Northeast wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 64. East wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 59. Southeast wind around 5 mph.
Thursday
Sunny, with a high near 69. East wind around 5 mph.
Thursday Night
Partly cloudy, with a low around 61. South wind around 5 mph becoming west after midnight.
Friday
Sunny, with a high near 72. Southwest wind 5 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Grand Isle LA
 29.21°N 90.07°W
Last Update:
6:18 pm CDT Mar 13, 2026
Forecast Valid:
6pm CDT Mar 13, 2026-6pm CDT Mar 20, 2026
 
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Additional Resources

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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