Marine and Coastal Impacts from Imelda; Unsettled Weather in the West

Swells and high surf from both Imelda and Humberto are expected to bring dangerous marine conditions and rip currents to much of the East Coast over the next several days. A series of Pacific frontal systems will bring waves of showers and thunderstorms to portions of northern California and the Pacific Northwest through midweek. Read More >

Current conditions at

Galliano, South Lafourche Airport (KGAO)

Lat: 29.44°NLon: 90.26°WElev: 0ft.

Fog/Mist

69°F

21°C

Humidity 92%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 66°F (19°C)
Visibility 3.00 mi
Last update 30 Sep 4:15 am CDT
Extended Forecast for

Grand Isle LA

  • Today

    Today: Mostly sunny, with a high near 86. North wind 5 to 10 mph becoming east in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 79. East wind around 5 mph becoming west after midnight.

    Low: 79 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 85. North wind 5 to 10 mph becoming east in the afternoon.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 1am, then a chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am.  Mostly clear, with a low around 79. East wind 5 to 10 mph.  Chance of precipitation is 30%.

    Low: 79 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm.  Sunny, with a high near 84. Breezy, with an east wind 10 to 20 mph.  Chance of precipitation is 60%.

    High: 84 °F

    Chance
    Showers then
    Showers
    Likely and
    Breezy

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms.  Mostly clear, with a low around 77. Breezy, with an east wind 15 to 20 mph.  Chance of precipitation is 50%.

    Low: 77 °F

    Breezy.
    Chance
    Showers then
    Chance
    T-storms

  • Friday

    Friday: A chance of showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers likely and possibly a thunderstorm after 1pm.  Mostly sunny, with a high near 82. Breezy, with an east wind around 20 mph.  Chance of precipitation is 60%.

    High: 82 °F

    Breezy.
    Chance
    T-storms then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm.  Partly cloudy, with a low around 76. Breezy, with an east wind 15 to 20 mph.  Chance of precipitation is 60%.

    Low: 76 °F

    Showers
    Likely and
    Breezy

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm.  Mostly sunny, with a high near 81. Breezy, with an east wind 15 to 20 mph.

    High: 81 °F

    Showers
    Likely and
    Breezy

Detailed Forecast

Today
Mostly sunny, with a high near 86. North wind 5 to 10 mph becoming east in the afternoon.
Tonight
Mostly cloudy, with a low around 79. East wind around 5 mph becoming west after midnight.
Wednesday
Sunny, with a high near 85. North wind 5 to 10 mph becoming east in the afternoon.
Wednesday Night
A slight chance of showers and thunderstorms before 1am, then a chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly clear, with a low around 79. East wind 5 to 10 mph. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Sunny, with a high near 84. Breezy, with an east wind 10 to 20 mph. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 77. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 50%.
Friday
A chance of showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 82. Breezy, with an east wind around 20 mph. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 76. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 81. Breezy, with an east wind 15 to 20 mph.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 77. Breezy, with an east wind 15 to 20 mph.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Northeast wind around 15 mph.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 78. East wind 10 to 15 mph.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. East wind around 10 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Isle LA
 29.23°N 89.99°W
12:26 am CDT Sep 30, 2025
4am CDT Sep 30, 2025-6pm CDT Oct 6, 2025
 
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Additional Resources

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Hourly Weather Forecast

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