Current conditions at
Galliano, South Lafourche Airport (KGAO)
Lat: 29.44°NLon: 90.26°WElev: 0ft.
Fair
84°F
29°C
| Humidity | 79% |
| Wind Speed | SW 8 mph |
| Barometer | 29.83 in |
| Dewpoint | 77°F (25°C) |
| Visibility | 10.00 mi |
| Heat Index | 94°F (34°C) |
| Last update | 2 Aug 5:35 am CDT |
Extended Forecast for
Grand Isle LA
Overnight

Low: 84 °F
Heavy Rain
and BreezySunday
High: 88 °F
Heavy Rain
and Breezy
then Chance
T-stormsSunday Night
Low: 82 °F
Slight Chance
T-storms then
Mostly ClearMonday

High: 89 °F
Sunny
Monday Night

Low: 82 °F
Mostly Clear
Tuesday

High: 89 °F
Sunny
Tuesday Night

Low: 82 °F
Mostly Clear
Wednesday

High: 88 °F
Sunny
Wednesday Night
Low: 82 °F
Mostly Clear
then Slight
Chance
T-storms
Detailed Forecast
Overnight
Showers and thunderstorms likely. Some of the storms could produce heavy rainfall. Partly cloudy, with a steady temperature around 84. Breezy, with a west wind around 20 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and thunderstorms, mainly before 1pm. Some of the storms could produce heavy rainfall. High near 88. Breezy, with a west wind 15 to 20 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A 20 percent chance of showers and thunderstorms, mainly between 10pm and 11pm. Partly cloudy, with a low around 82. West wind 10 to 15 mph.
Monday
Sunny, with a high near 89. Northwest wind around 5 mph becoming southwest in the afternoon.
Monday Night
Mostly clear, with a low around 82. Southwest wind around 10 mph.
Tuesday
Sunny, with a high near 89. West wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 82. Southwest wind around 5 mph.
Wednesday
Sunny, with a high near 88. South wind around 5 mph.
Wednesday Night
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 82. South wind around 5 mph.
Thursday
A slight chance of showers and thunderstorms before 1pm. Sunny, with a high near 88. Southeast wind around 5 mph.
Thursday Night
Mostly clear, with a low around 82. Southeast wind around 5 mph.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87. East wind 5 to 10 mph.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 82. Southeast wind 5 to 10 mph.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. East wind around 5 mph.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Grand Isle LA
29.23°N 89.99°W
29.23°N 89.99°W
2:01 am CDT Aug 2, 2026
5am CDT Aug 2, 2026-6pm CDT Aug 8, 2026


