Grand Isle, LA Weather & Growing Conditions
Today
88°F
Sunny
Sunny. High near 88, with temperatures falling to around 86 in the afternoon. East wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Sunny | 5 to 10 mph E | 2% |
| Tonight | 82°F | Mostly Clear | 5 mph SE | 2% |
| Sunday | 88°F | Sunny | 0 to 5 mph E | 4% |
| Sunday Night | 82°F | Mostly Clear | 5 mph SE | 6% |
| Monday | 88°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 37% |
| Monday Night | 81°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph E | 15% |
| Tuesday | 88°F | Sunny | 5 to 10 mph NE | 10% |
| Tuesday Night | 81°F | Mostly Clear | 5 mph E | 9% |
| Wednesday | 88°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 15 mph NE | 15% |
| Wednesday Night | 81°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph E | 15% |
| Thursday | 87°F | Sunny then Slight Chance Showers And Thunderstorms | 15 mph NE | 19% |
| Thursday Night | 80°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 10 to 15 mph E | 19% |
| Friday | 86°F | Mostly Sunny | 15 mph NE | 12% |
| Friday Night | 79°F | Partly Cloudy | 10 to 15 mph E | 12% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grand Isle, LA
Last spring frost
Feb 8
First fall frost
Dec 19
Growing season
311 days
Hardiness zone
10a
Explore more for Grand Isle, LA: full frost dates · planting calendar · Louisiana frost dates
Climate data from the nearest NOAA station, Galliano, La (24 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.