Grand Isle, ME Weather & Growing Conditions
Today
54°F
Sunny
Sunny, with a high near 54. Northwest wind 7 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 54°F | Sunny | 7 to 10 mph NW | 0% |
| Tonight | 37°F | Partly Cloudy | 1 to 5 mph E | 1% |
| Sunday | 54°F | Cloudy then Chance Rain Showers | 5 to 8 mph S | 50% |
| Sunday Night | 37°F | Chance Rain Showers | 6 mph SW | 51% |
| Monday | 53°F | Patchy Fog then Partly Sunny | 6 to 13 mph NW | 23% |
| Monday Night | 35°F | Mostly Clear | 6 to 9 mph NW | 0% |
| Tuesday | 57°F | Sunny | 8 mph NW | 0% |
| Tuesday Night | 34°F | Mostly Clear | 2 to 6 mph N | 0% |
| Wednesday | 61°F | Sunny | 3 mph NW | 0% |
| Wednesday Night | 35°F | Mostly Clear | 2 mph NW | 0% |
| Thursday | 65°F | Sunny | 0 to 3 mph NW | 1% |
| Thursday Night | 39°F | Partly Cloudy | 3 mph N | 6% |
| Friday | 64°F | Partly Sunny | 6 mph N | 8% |
| Friday Night | 38°F | Partly Cloudy | 6 mph N | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grand Isle, ME
Last spring frost
May 6
First fall frost
Oct 2
Growing season
147 days
Hardiness zone
4a
Explore more for Grand Isle, ME: full frost dates · planting calendar · Maine frost dates
Climate data from the nearest NOAA station, Frenchville Aroostook Ap, Me (8.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.