Grand Isle, LA Weather & Growing Conditions
Today
88°F
Slight Chance Showers And Thunderstorms then Sunny
A slight chance of showers and thunderstorms before 11am. Sunny, with a high near 88. Southwest wind around 5 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Slight Chance Showers And Thunderstorms then Sunny | 5 mph SW | 16% |
| Tonight | 82°F | Mostly Clear | 5 mph SW | 4% |
| Wednesday | 88°F | Sunny | 5 mph SW | 13% |
| Wednesday Night | 82°F | Mostly Clear | 5 mph S | 3% |
| Thursday | 87°F | Sunny | 0 to 5 mph S | 9% |
| Thursday Night | 82°F | Mostly Clear | 5 mph SE | 9% |
| Friday | 87°F | Chance Showers And Thunderstorms | 5 to 10 mph E | 30% |
| Friday Night | 82°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph E | 20% |
| Saturday | 87°F | Chance Showers And Thunderstorms | 5 to 10 mph E | 42% |
| Saturday Night | 82°F | Slight Chance Showers And Thunderstorms | 5 mph SE | 22% |
| Sunday | 87°F | Chance Showers And Thunderstorms | 5 mph SE | 52% |
| Sunday Night | 82°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 27% |
| Monday | 87°F | Chance Showers And Thunderstorms | 5 mph S | 45% |
| Monday Night | 82°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 19% |
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 Aug 4, 2026.