Grand Isle, LA Weather & Growing Conditions
Today
82°F
Slight Chance Rain Showers
A slight chance of rain showers before 2pm. Mostly sunny. High near 82, with temperatures falling to around 77 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Slight Chance Rain Showers | 5 to 10 mph SW | 20% |
| Tonight | 60°F | Partly Cloudy | 0 to 5 mph NW | 1% |
| Thursday | 80°F | Sunny | 0 to 5 mph W | 0% |
| Thursday Night | 63°F | Partly Cloudy | 0 to 5 mph W | 5% |
| Friday | 79°F | Partly Sunny | 5 to 10 mph N | 13% |
| Friday Night | 58°F | Partly Cloudy | 5 to 10 mph N | 2% |
| Saturday | 75°F | Mostly Sunny | 5 to 15 mph NE | 1% |
| Saturday Night | 55°F | Partly Cloudy | 5 to 10 mph NE | 2% |
| Sunday | 71°F | Slight Chance Rain Showers | 10 mph N | 15% |
| Sunday Night | 53°F | Partly Cloudy | 10 mph N | 5% |
| Monday | 72°F | Sunny | 5 to 10 mph NE | 7% |
| Monday Night | 53°F | Partly Cloudy | 5 mph N | 5% |
| Tuesday | 73°F | Sunny | 5 to 10 mph NE | 6% |
| Tuesday Night | 55°F | Partly Cloudy | 0 to 5 mph NE | 4% |
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 (15.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.