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/Mist

57°F

14°C

Humidity 91%
Wind Speed Calm
Barometer 30.13 in
Dewpoint 55°F (13°C)
Visibility 0.75 mi
Last update 13 Feb 10:55 pm CST
Extended Forecast for

Grand Isle LA

Dense Fog Advisory February 14, 12:00am until February 14, 09:00am
Click here for hazard details and duration
Dense Fog Advisory

  • Tonight

    Tonight: Patchy dense fog after midnight. Otherwise, mostly cloudy, with a low around 59. East wind around 5 mph.

    Low: 59 °F

    Patchy Dense
    Fog

  • Saturday

    Saturday: A slight chance of showers before 1pm, then a slight chance of showers after 5pm. Patchy dense fog before 9am. Otherwise, partly sunny, with a high near 68. East wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 68 °F

    Patchy Dense
    Fog then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 62. Windy, with a south wind 20 to 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Windy. Chance
    Showers then
    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm before noon, then a slight chance of showers. Mostly cloudy, then gradually becoming sunny, with a high near 69. Windy, with a southwest wind 20 to 30 mph becoming west in the afternoon. Chance of precipitation is 70%.

    High: 69 °F

    Showers
    Likely and
    Windy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56. Breezy, with a west wind 10 to 20 mph becoming north after midnight.

    Low: 56 °F

    Mostly Clear
    and Breezy
    then Partly
    Cloudy

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 63. North wind 5 to 10 mph becoming east in the afternoon.

    High: 63 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 59. East wind around 5 mph becoming south after midnight.

    Low: 59 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 68. Southeast wind around 5 mph.

    High: 68 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 63. South wind around 5 mph.

    Low: 63 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy dense fog after midnight. Otherwise, mostly cloudy, with a low around 59. East wind around 5 mph.
Saturday
A slight chance of showers before 1pm, then a slight chance of showers after 5pm. Patchy dense fog before 9am. Otherwise, partly sunny, with a high near 68. East wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Saturday Night
Showers and possibly a thunderstorm. Low around 62. Windy, with a south wind 20 to 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers likely and possibly a thunderstorm before noon, then a slight chance of showers. Mostly cloudy, then gradually becoming sunny, with a high near 69. Windy, with a southwest wind 20 to 30 mph becoming west in the afternoon. Chance of precipitation is 70%.
Sunday Night
Partly cloudy, with a low around 56. Breezy, with a west wind 10 to 20 mph becoming north after midnight.
Washington's Birthday
Mostly sunny, with a high near 63. North wind 5 to 10 mph becoming east in the afternoon.
Monday Night
Partly cloudy, with a low around 59. East wind around 5 mph becoming south after midnight.
Tuesday
Partly sunny, with a high near 68. Southeast wind around 5 mph.
Tuesday Night
Mostly cloudy, with a low around 63. South wind around 5 mph.
Wednesday
Mostly sunny, with a high near 70. South wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 64. South wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 70. South wind around 10 mph.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 64. South wind 5 to 10 mph.
Friday
A slight chance of showers. Mostly sunny, with a high near 70. South wind 5 to 10 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:
10:07 pm CST Feb 13, 2026
Forecast Valid:
11pm CST Feb 13, 2026-6pm CST Feb 20, 2026
 
Forecast Discussion
 
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Additional Resources

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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