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

58°F

14°C

Humidity 30%
Wind Speed S 12 G 16 mph
Barometer 30.18 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 24 Feb 3:15 pm CST
Extended Forecast for

Grand Isle LA

  • Tonight

    Tonight: Partly cloudy, with a temperature falling to near 58 by 11pm, then rising to around 64 during the remainder of the night. Breezy, with a southwest wind 10 to 20 mph.

    Low: 58 °F⇑

    Partly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 71. Breezy, with a southwest wind 15 to 20 mph.

    High: 71 °F

    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers. Mostly cloudy, with a steady temperature around 68. Breezy, with a south wind 15 to 20 mph.

    Low: 68 °F

    Slight Chance
    Showers and
    Breezy

  • Thursday

    Thursday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 71. South wind around 15 mph, with gusts as high as 25 mph.

    High: 71 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely, mainly after midnight. Mostly cloudy, with a low around 64. South wind 10 to 15 mph. Chance of precipitation is 60%.

    Low: 64 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 9am. Mostly sunny, with a high near 70. West wind 5 to 10 mph becoming northeast in the afternoon. Chance of precipitation is 50%.

    High: 70 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 61. Northeast wind 5 to 10 mph.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 69. East wind 5 to 10 mph.

    High: 69 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 63. East wind around 5 mph.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a temperature falling to near 58 by 11pm, then rising to around 64 during the remainder of the night. Breezy, with a southwest wind 10 to 20 mph.
Wednesday
Mostly sunny, with a high near 71. Breezy, with a southwest wind 15 to 20 mph.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a steady temperature around 68. Breezy, with a south wind 15 to 20 mph.
Thursday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 71. South wind around 15 mph, with gusts as high as 25 mph.
Thursday Night
Showers likely, mainly after midnight. Mostly cloudy, with a low around 64. South wind 10 to 15 mph. Chance of precipitation is 60%.
Friday
A chance of showers, with thunderstorms also possible after 9am. Mostly sunny, with a high near 70. West wind 5 to 10 mph becoming northeast in the afternoon. Chance of precipitation is 50%.
Friday Night
Mostly clear, with a low around 61. Northeast wind 5 to 10 mph.
Saturday
Sunny, with a high near 69. East wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 63. East wind around 5 mph.
Sunday
Sunny, with a high near 70. East wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 64. East wind around 5 mph.
Monday
Sunny, with a high near 70. East wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 64. Southeast wind around 10 mph.
Tuesday
Sunny, with a high near 70. East wind 10 to 15 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:
1:34 pm CST Feb 24, 2026
Forecast Valid:
3pm CST Feb 24, 2026-6pm CST Mar 3, 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