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

Galliano, South Lafourche Airport (KGAO)

Lat: 29.44°NLon: 90.26°WElev: 0ft.

Mostly Cloudy

79°F

26°C

Humidity 70%
Wind Speed E 12 G 18 mph
Barometer 30.14 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 3 Apr 2:35 pm CDT
Extended Forecast for

15 Miles WSW Grand Isle LA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 80. East wind around 15 mph.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 69. East wind around 10 mph.

    Low: 69 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms, mainly after noon. Patchy fog before 8am. Otherwise, partly sunny, with a high near 81. Southeast wind around 10 mph.

    High: 81 °F

    Chance
    T-storms and
    Patchy Fog

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 70%.

    Low: 67 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers and possibly a thunderstorm. Patchy fog before 8am. High near 77. Light and variable wind becoming north 5 to 10 mph in the morning. Chance of precipitation is 80%.

    High: 77 °F

    Showers and
    Patchy Fog

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Cloudy, with a low around 58. Northeast wind 10 to 15 mph. Chance of precipitation is 50%.

    Low: 58 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A 40 percent chance of showers. Cloudy, with a high near 70. Northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 70 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 59. Northeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers after 1pm. Partly sunny, with a high near 74. Breezy, with an east wind 15 to 20 mph.

    High: 74 °F

    Partly Sunny
    then Slight
    Chance
    Showers and
    Breezy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 80. East wind around 15 mph.
Tonight
Partly cloudy, with a low around 69. East wind around 10 mph.
Saturday
A 40 percent chance of showers and thunderstorms, mainly after noon. Patchy fog before 8am. Otherwise, partly sunny, with a high near 81. Southeast wind around 10 mph.
Saturday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 70%.
Sunday
Showers and possibly a thunderstorm. Patchy fog before 8am. High near 77. Light and variable wind becoming north 5 to 10 mph in the morning. Chance of precipitation is 80%.
Sunday Night
A chance of showers and thunderstorms. Cloudy, with a low around 58. Northeast wind 10 to 15 mph. Chance of precipitation is 50%.
Monday
A 40 percent chance of showers. Cloudy, with a high near 70. Northeast wind around 15 mph, with gusts as high as 25 mph.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 59. Northeast wind around 10 mph, with gusts as high as 20 mph.
Tuesday
A slight chance of showers after 1pm. Partly sunny, with a high near 74. Breezy, with an east wind 15 to 20 mph.
Tuesday Night
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 63. East wind 10 to 15 mph.
Wednesday
A chance of showers. Mostly cloudy, with a high near 74. Breezy, with an east wind 15 to 20 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 64. East wind around 15 mph, with gusts as high as 25 mph.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 76. East wind around 15 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
15 Miles WSW Grand Isle LA
 29.13°N 90.2°W
Last Update:
2:01 pm CDT Apr 3, 2026
Forecast Valid:
2pm CDT Apr 3, 2026-6pm CDT Apr 9, 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