National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Galliano, South Lafourche Airport (KGAO)

Lat: 29.44°NLon: 90.26°WElev: 0ft.

Mostly Cloudy

71°F

22°C

Humidity 90%
Wind Speed SE 3 mph
Barometer 30.09 in
Dewpoint 67°F (19°C)
Visibility NA
Last update 5 Mar 3:55 am CST
Extended Forecast for

15 Miles WSW Grand Isle LA

Dense Fog Advisory until March 5, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until March 5, 10:00am

    NOW until 10:00am Thu

    Dense Fog Advisory

  • Overnight

    Low: 64 °F

    Patchy Fog

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly between 1pm and 5pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 78. East wind 5 to 10 mph.

    High: 78 °F

    Patchy Fog
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Patchy fog before 1am, then patchy fog after 4am. Otherwise, mostly cloudy, with a low around 65. Southeast wind around 5 mph.

    Low: 65 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after noon. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 79. Southeast wind 5 to 10 mph.

    High: 79 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 66. Southeast wind 5 to 10 mph.

    Low: 66 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79. Southeast wind 5 to 10 mph.

    High: 79 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 64. Southeast wind around 5 mph.

    Low: 64 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 77. Southeast wind around 5 mph. Chance of precipitation is 40%.

    High: 77 °F

    Chance
    Showers

Detailed Forecast

Overnight
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 64. Southeast wind around 5 mph.
Thursday
A 30 percent chance of showers and thunderstorms, mainly between 1pm and 5pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 78. East wind 5 to 10 mph.
Thursday Night
Patchy fog before 1am, then patchy fog after 4am. Otherwise, mostly cloudy, with a low around 65. Southeast wind around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms after noon. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 79. Southeast wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 66. Southeast wind 5 to 10 mph.
Saturday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79. Southeast wind 5 to 10 mph.
Saturday Night
A 30 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 64. Southeast wind around 5 mph.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 77. Southeast wind around 5 mph. Chance of precipitation is 40%.
Sunday Night
Mostly cloudy, with a low around 65. Southeast wind around 5 mph.
Monday
Partly sunny, with a high near 79. Southeast wind 5 to 10 mph.
Monday Night
Partly cloudy, with a low around 66. Southeast wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 79. Southeast wind 10 to 15 mph.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Southeast wind around 10 mph, with gusts as high as 20 mph.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. South wind 10 to 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:
11:33 pm CST Mar 4, 2026
Forecast Valid:
4am CST Mar 5, 2026-6pm CDT Mar 11, 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