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

77°F

25°C

Humidity 77%
Wind Speed SE 9 G 17 mph
Barometer 30.06 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 2 Apr 5:35 pm CDT
Extended Forecast for

15 Miles WSW Grand Isle LA

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Southeast wind around 10 mph.

    High: 80 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 68. Southeast wind around 10 mph.

    Low: 68 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A slight chance of showers and thunderstorms between 1pm and 2pm. Mostly sunny, with a high near 80. Southeast wind 10 to 15 mph. Chance of precipitation is 20%.

    High: 80 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

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

    Low: 69 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80. Southeast wind around 10 mph.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Southeast wind around 5 mph. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely

  • Sunday

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

    High: 78 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Cloudy, with a low around 58. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    Low: 58 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers. Cloudy, with a high near 69. Northeast wind around 15 mph, with gusts as high as 30 mph.

    High: 69 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Southeast wind around 10 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 68. Southeast wind around 10 mph.
Friday
A slight chance of showers and thunderstorms between 1pm and 2pm. Mostly sunny, with a high near 80. Southeast wind 10 to 15 mph. Chance of precipitation is 20%.
Friday Night
Patchy fog between 10pm and midnight. Otherwise, partly cloudy, with a low around 69. East wind around 10 mph.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80. Southeast wind around 10 mph.
Saturday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Southeast wind around 5 mph. Chance of precipitation is 60%.
Sunday
Showers and possibly a thunderstorm. High near 78. East wind 5 to 10 mph becoming north in the morning. Chance of precipitation is 80%.
Sunday Night
A chance of showers and thunderstorms. Cloudy, with a low around 58. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Monday
A chance of showers. Cloudy, with a high near 69. Northeast wind around 15 mph, with gusts as high as 30 mph.
Monday Night
A chance of showers. Mostly cloudy, with a low around 57. Northeast wind 10 to 15 mph.
Tuesday
Mostly sunny, with a high near 74. Northeast wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 60. Northeast wind around 10 mph, with gusts as high as 20 mph.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 74. East wind around 15 mph.
Wednesday Night
A slight chance of showers. Mostly clear, with a low around 62. East wind 10 to 15 mph.
Thursday
A slight chance of showers. Mostly sunny, with a high near 75. East wind around 15 mph, with gusts as high as 25 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:
2:02 pm CDT Apr 2, 2026
Forecast Valid:
5pm CDT Apr 2, 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