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.

Fog

54°F

12°C

Humidity 94%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 52°F (11°C)
Visibility 0.25 mi
Last update 17 Nov 4:35 am CST
Extended Forecast for

13 Miles WSW Grand Isle LA

Dense Fog Advisory November 17, 04:58am until November 17, 09:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory November 17, 04:58am until November 17, 09:00am

    NOW until 9:00am Mon

    Dense Fog Advisory

  • Today

    High: 77 °F

    Dense Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 65. Southeast wind around 5 mph.

    Low: 65 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 77. Southeast wind around 5 mph.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Southeast wind around 5 mph becoming calm.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 78. Calm wind becoming east around 5 mph in the morning.

    High: 78 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 64. Southeast wind around 5 mph.

    Low: 64 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 78. Southeast wind 5 to 10 mph.

    High: 78 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 65. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    Showers

Detailed Forecast

Today
Widespread dense fog, mainly before 8am. Otherwise, mostly sunny, with a high near 77. Calm wind becoming east around 5 mph in the morning.
Tonight
Partly cloudy, with a low around 65. Southeast wind around 5 mph.
Tuesday
Sunny, with a high near 77. Southeast wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 64. Southeast wind around 5 mph becoming calm.
Wednesday
Mostly sunny, with a high near 78. Calm wind becoming east around 5 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 64. Southeast wind around 5 mph.
Thursday
Partly sunny, with a high near 78. Southeast wind 5 to 10 mph.
Thursday Night
A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 65. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Friday
A chance of showers. Mostly sunny, with a high near 78. South wind 5 to 10 mph.
Friday Night
A chance of showers, mainly after midnight. Partly cloudy, with a low around 63. South wind around 5 mph.
Saturday
A chance of showers. Mostly sunny, with a high near 76. South wind 5 to 10 mph.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 61. Southwest wind around 5 mph becoming southeast after midnight.
Sunday
A slight chance of showers. Mostly sunny, with a high near 76. Southeast wind 5 to 10 mph becoming southwest in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
13 Miles WSW Grand Isle LA
 29.15°N 90.17°W
Last Update:
3:31 am CST Nov 17, 2025
Forecast Valid:
4am CST Nov 17, 2025-6pm CST Nov 23, 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