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.

Fair

60°F

16°C

Humidity 90%
Wind Speed S 3 mph
Barometer 30.17 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 10 Feb 8:15 pm CST
Extended Forecast for

Grand Isle LA

Dense Fog Advisory February 11, 12:00am until February 11, 08:00am
Click here for hazard details and duration
Dense Fog Advisory

  • Tonight

    Tonight: A 20 percent chance of showers after 5am. Patchy dense fog after 11pm. Otherwise, mostly cloudy, with a low around 59. South wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Patchy Fog
    then Slight
    Chance
    Showers and
    Patchy Dense
    Fog

  • Wednesday

    Wednesday: A 30 percent chance of showers, mainly before 3pm. Areas of dense fog before 11am. Otherwise, partly sunny, with a high near 65. Calm wind becoming south around 5 mph in the afternoon.

    High: 65 °F

    Chance
    Showers and
    Areas Dense
    Fog

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before midnight. Patchy fog between 8pm and 10pm. Otherwise, mostly cloudy, with a low around 57. Southwest wind around 5 mph becoming northeast after midnight.

    Low: 57 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Mostly
    Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 64. Northeast wind 5 to 10 mph becoming southeast in the afternoon.

    High: 64 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 58. South wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 66. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 66 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 61. Southeast wind 5 to 10 mph.

    Low: 61 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers after noon. Mostly cloudy, with a high near 69. Breezy, with a southeast wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon.

    High: 69 °F

    Mostly Cloudy
    then Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: Showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 61. Windy, with a southwest wind 25 to 30 mph.

    Low: 61 °F

    Showers and
    Windy

Detailed Forecast

Tonight
A 20 percent chance of showers after 5am. Patchy dense fog after 11pm. Otherwise, mostly cloudy, with a low around 59. South wind around 5 mph becoming calm in the evening.
Wednesday
A 30 percent chance of showers, mainly before 3pm. Areas of dense fog before 11am. Otherwise, partly sunny, with a high near 65. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
A 20 percent chance of showers before midnight. Patchy fog between 8pm and 10pm. Otherwise, mostly cloudy, with a low around 57. Southwest wind around 5 mph becoming northeast after midnight.
Thursday
Partly sunny, with a high near 64. Northeast wind 5 to 10 mph becoming southeast in the afternoon.
Thursday Night
Mostly cloudy, with a low around 58. South wind around 5 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 66. Calm wind becoming southeast around 5 mph in the afternoon.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 61. Southeast wind 5 to 10 mph.
Saturday
A 40 percent chance of showers after noon. Mostly cloudy, with a high near 69. Breezy, with a southeast wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon.
Saturday Night
Showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 61. Windy, with a southwest wind 25 to 30 mph.
Sunday
A chance of showers. Mostly sunny, with a high near 67. Windy, with a southwest wind 20 to 30 mph becoming west in the afternoon.
Sunday Night
Mostly clear, with a low around 55. Breezy, with a northwest wind 15 to 20 mph decreasing to 10 to 15 mph after midnight.
Washington's Birthday
Sunny, with a high near 64. Northeast wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 56. East wind around 5 mph.
Tuesday
Mostly sunny, with a high near 65. East wind around 5 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grand Isle LA
 29.23°N 89.99°W
Last Update:
7:13 pm CST Feb 10, 2026
Forecast Valid:
8pm CST Feb 10, 2026-6pm CST Feb 17, 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