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

88°F

31°C

Humidity 64%
Wind Speed S 13 G 18 mph
Barometer 30.00 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 17 Jun 4:15 pm CDT
Extended Forecast for

5 Miles WSW Grand Isle LA

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. South wind around 10 mph.

    High: 87 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a steady temperature around 85. South wind 5 to 10 mph.

    Low: 85 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Sunny, with a high near 87. South wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 87 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 83. South wind 5 to 10 mph.

    Low: 83 °F

    Chance
    T-storms

  • Juneteenth

    Juneteenth: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. South wind 5 to 10 mph. Chance of precipitation is 70%.

    High: 88 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 82. Southwest wind around 5 mph.

    Low: 82 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms. Sunny, with a high near 88. West wind around 5 mph becoming northeast in the morning.

    High: 88 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 82. South wind around 5 mph.

    Low: 82 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms. Sunny, with a high near 88. Southeast wind 5 to 10 mph.

    High: 88 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. South wind around 10 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a steady temperature around 85. South wind 5 to 10 mph.
Wednesday
A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Sunny, with a high near 87. South wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 83. South wind 5 to 10 mph.
Juneteenth
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. South wind 5 to 10 mph. Chance of precipitation is 70%.
Thursday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 82. Southwest wind around 5 mph.
Friday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 88. West wind around 5 mph becoming northeast in the morning.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 82. South wind around 5 mph.
Saturday
A chance of showers and thunderstorms. Sunny, with a high near 88. Southeast wind 5 to 10 mph.
Saturday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 82. Southeast wind around 10 mph.
Sunday
Showers likely and possibly a thunderstorm. Sunny, with a high near 87. Southeast wind 5 to 10 mph.
Sunday Night
Showers and thunderstorms likely. Mostly clear, with a low around 82. Southeast wind around 10 mph.
Monday
Showers and possibly a thunderstorm. Mostly sunny, with a high near 88. East wind 10 to 15 mph.
Monday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 82. Southeast wind 10 to 15 mph.
Tuesday
Showers and possibly a thunderstorm. Mostly sunny, with a high near 88. East wind 10 to 15 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:
3:51 pm CDT Jun 17, 2025
Forecast Valid:
4pm CDT Jun 17, 2025-6pm CDT Jun 24, 2025
 
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