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

Tropical Storm and Storm Surge Warnings for the North Carolina Outer Banks; Heat Building in the West

Storm surge flooding and tropical storm conditions are expected in the Outer Banks beginning late Wednesday. Tropical Storm and Storm Surge Warnings are in effect. Tropical storm conditions are possible along the eastern shore of Virginia Thursday. Hurricane Erin will continue to produce life-threatening surf and rip currents along much of the east coast of the U.S. this week. Read More >

Current conditions at

Galliano, South Lafourche Airport (KGAO)

Lat: 29.44°NLon: 90.26°WElev: 0ft.

Fair

76°F

24°C

Humidity 89%
Wind Speed Calm
Barometer 29.91 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 20 Aug 2:35 am CDT
Extended Forecast for

15 Miles SW Grand Isle LA

  • Overnight

    Overnight: A 10 percent chance of showers and thunderstorms after 5am. Mostly clear, with a low around 81. North wind around 5 mph.

    Low: 81 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly between 7am and 3pm. Sunny, with a high near 88. North wind 5 to 10 mph becoming southeast in the afternoon.

    High: 88 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 82. South wind around 5 mph becoming calm.

    Low: 82 °F

    Mostly Clear

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly after 7am. Sunny, with a high near 89. North wind around 5 mph becoming southwest in the afternoon.

    High: 89 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 81. Southwest wind around 5 mph.

    Low: 81 °F

    Chance
    T-storms

  • Friday

    Friday: Showers and thunderstorms likely, mainly between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Mostly sunny, with a high near 88. Southwest wind around 5 mph. Chance of precipitation is 60%.

    High: 88 °F

    T-storms
    Likely

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 81. Southwest wind around 5 mph.

    Low: 81 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. West wind around 5 mph.

    High: 88 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 80. Southwest wind around 5 mph.

    Low: 80 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A 10 percent chance of showers and thunderstorms after 5am. Mostly clear, with a low around 81. North wind around 5 mph.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly between 7am and 3pm. Sunny, with a high near 88. North wind 5 to 10 mph becoming southeast in the afternoon.
Wednesday Night
Mostly clear, with a low around 82. South wind around 5 mph becoming calm.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 7am. Sunny, with a high near 89. North wind around 5 mph becoming southwest in the afternoon.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 81. Southwest wind around 5 mph.
Friday
Showers and thunderstorms likely, mainly between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Mostly sunny, with a high near 88. Southwest wind around 5 mph. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 81. Southwest wind around 5 mph.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. West wind around 5 mph.
Saturday Night
A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 80. Southwest wind around 5 mph.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Southwest wind around 5 mph.
Sunday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 80. Southwest wind around 5 mph.
Monday
A chance of showers and thunderstorms. Sunny, with a high near 88. Northwest wind around 5 mph becoming southwest in the afternoon.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Southwest wind around 5 mph becoming north after midnight.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. North wind 5 to 10 mph becoming southeast in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
15 Miles SW Grand Isle LA
 29.1°N 90.2°W
Last Update:
12:26 am CDT Aug 20, 2025
Forecast Valid:
2am CDT Aug 20, 2025-6pm CDT Aug 26, 2025
 
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