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

73°F

23°C

Humidity 84%
Wind Speed SE 7 mph
Barometer 30.07 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 3 Apr 1:15 am CDT
Extended Forecast for

15 Miles WSW Grand Isle LA

  • Overnight

    Overnight: Partly cloudy, with a low around 69. Southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 69 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 80. Southeast wind 10 to 15 mph.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Patchy fog between 10pm and midnight. Otherwise, partly cloudy, with a low around 69. Southeast wind around 10 mph.

    Low: 69 °F

    Patchy Fog
    then Partly
    Cloudy

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81. Southeast wind around 10 mph.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Southeast wind around 5 mph. Chance of precipitation is 70%.

    Low: 67 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 78. South wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 80%.

    High: 78 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Cloudy, with a low around 57. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    Low: 57 °F

    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 70. Breezy, with a northeast wind 15 to 20 mph.

    High: 70 °F

    Chance
    Showers and
    Breezy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 58. Northeast wind 10 to 15 mph.

    Low: 58 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 69. Southeast wind around 10 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 80. Southeast wind 10 to 15 mph.
Friday Night
Patchy fog between 10pm and midnight. Otherwise, partly cloudy, with a low around 69. Southeast wind around 10 mph.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81. Southeast wind around 10 mph.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Southeast wind around 5 mph. Chance of precipitation is 70%.
Sunday
Showers and possibly a thunderstorm. High near 78. South wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 80%.
Sunday Night
A chance of showers and thunderstorms. Cloudy, with a low around 57. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Monday
A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 70. Breezy, with a northeast wind 15 to 20 mph.
Monday Night
Mostly cloudy, with a low around 58. Northeast wind 10 to 15 mph.
Tuesday
Mostly sunny, with a high near 74. Breezy, with a northeast wind 15 to 20 mph.
Tuesday Night
Mostly cloudy, with a low around 61. Northeast wind 10 to 15 mph.
Wednesday
A chance of showers. Mostly sunny, with a high near 75. East wind around 15 mph.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 64. East wind around 15 mph.
Thursday
A chance of showers. Mostly sunny, with a high near 76. East wind around 15 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:
1:25 am CDT Apr 3, 2026
Forecast Valid:
1am CDT Apr 3, 2026-6pm CDT Apr 9, 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