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.

80°F

27°C

Humidity 89%
Wind Speed S 3 mph
Barometer 29.98 in
Dewpoint 76°F (24°C)
Visibility NA
Heat Index85°F (29°C)
Last update 27 Aug 12:35 am CDT
Extended Forecast for

Galliano LA

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a steady temperature around 79. Calm wind.

    Low: 79 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 5pm. High near 90. Calm wind becoming northwest around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 90 °F

    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 74. Calm wind.

    Low: 74 °F

    Chance
    T-storms

  • Friday

    Friday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. High near 89. Calm wind becoming north around 5 mph. Chance of precipitation is 80%.

    High: 89 °F

    Showers
    Likely then
    T-storms

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 7pm, then a slight chance of showers and thunderstorms after 1am. Low around 74. Calm wind. Chance of precipitation is 80%.

    Low: 74 °F

    T-storms then
    Slight Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming east around 5 mph in the morning.

    High: 91 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. Calm wind.

    Low: 75 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 1pm. Mostly sunny, with a high near 89. Calm wind becoming southeast around 5 mph in the morning. Chance of precipitation is 60%.

    High: 89 °F

    T-storms
    Likely

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 75. Southeast wind around 5 mph becoming calm.

    Low: 75 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a steady temperature around 79. Calm wind.
Thursday
Showers and thunderstorms, mainly before 5pm. High near 90. Calm wind becoming northwest around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 74. Calm wind.
Friday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. High near 89. Calm wind becoming north around 5 mph. Chance of precipitation is 80%.
Friday Night
Showers and possibly a thunderstorm before 7pm, then a slight chance of showers and thunderstorms after 1am. Low around 74. Calm wind. Chance of precipitation is 80%.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming east around 5 mph in the morning.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. Calm wind.
Sunday
Showers and thunderstorms likely, mainly after 1pm. Mostly sunny, with a high near 89. Calm wind becoming southeast around 5 mph in the morning. Chance of precipitation is 60%.
Sunday Night
A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 75. Southeast wind around 5 mph becoming calm.
Monday
Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Mostly sunny, with a high near 90. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Calm wind.
Tuesday
Showers and thunderstorms likely. Mostly sunny, with a high near 91. Calm wind becoming east around 5 mph in the afternoon.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. Calm wind.
Wednesday
Showers and thunderstorms likely. Mostly sunny, with a high near 91. Calm wind becoming east around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Galliano LA
 29.45°N 90.32°W
Last Update:
11:25 pm CDT Aug 26, 2026
Forecast Valid:
12am CDT Aug 27, 2026-6pm CDT Sep 2, 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