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

65°F

18°C

Humidity 67%
Wind Speed E 6 mph
Barometer 30.30 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 21 Jan 10:15 am CST
Extended Forecast for

15 Miles WSW Grand Isle LA

  • Today

    Today: A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 69. Southeast wind 5 to 10 mph.

    High: 69 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tonight

    Tonight: A 30 percent chance of showers, mainly between 10pm and 3am. Mostly cloudy, with a low around 61. Southeast wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 69. Northeast wind around 5 mph becoming east in the afternoon.

    High: 69 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 61. Southeast wind around 5 mph.

    Low: 61 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A 40 percent chance of showers, mainly after 9am. Mostly cloudy, with a high near 68. East wind 5 to 10 mph.

    High: 68 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 58. East wind 5 to 10 mph.

    Low: 58 °F

    Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers. Mostly cloudy, with a high near 66. East wind 10 to 15 mph.

    High: 66 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely. Cloudy, with a low around 46. Southeast wind around 10 mph becoming north after midnight. Chance of precipitation is 70%.

    Low: 46 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely, mainly before noon. Mostly cloudy, with a high near 57. North wind 10 to 15 mph.

    High: 57 °F

    Showers
    Likely

Detailed Forecast

Today
A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 69. Southeast wind 5 to 10 mph.
Tonight
A 30 percent chance of showers, mainly between 10pm and 3am. Mostly cloudy, with a low around 61. Southeast wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 69. Northeast wind around 5 mph becoming east in the afternoon.
Thursday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 61. Southeast wind around 5 mph.
Friday
A 40 percent chance of showers, mainly after 9am. Mostly cloudy, with a high near 68. East wind 5 to 10 mph.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 58. East wind 5 to 10 mph.
Saturday
A 50 percent chance of showers. Mostly cloudy, with a high near 66. East wind 10 to 15 mph.
Saturday Night
Showers likely. Cloudy, with a low around 46. Southeast wind around 10 mph becoming north after midnight. Chance of precipitation is 70%.
Sunday
Showers likely, mainly before noon. Mostly cloudy, with a high near 57. North wind 10 to 15 mph.
Sunday Night
A chance of showers before midnight. Mostly cloudy, with a low around 33. North wind 10 to 15 mph.
Monday
Mostly sunny, with a high near 46. North wind 10 to 15 mph.
Monday Night
Mostly clear, with a low around 33. North wind around 10 mph.
Tuesday
Sunny, with a high near 50. Northeast wind 5 to 10 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:
10:12 am CST Jan 21, 2026
Forecast Valid:
10am CST Jan 21, 2026-6pm CST Jan 27, 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