Grand Isle, ME Weather & Growing Conditions
Today
75°F
Sunny
Sunny, with a high near 75. West wind 14 to 21 mph, with gusts as high as 41 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Sunny | 14 to 21 mph W | 1% |
| Tonight | 60°F | Mostly Clear | 5 to 12 mph W | 2% |
| Wednesday | 87°F | Sunny | 3 to 7 mph SW | 1% |
| Wednesday Night | 56°F | Mostly Clear | 2 to 6 mph W | 0% |
| Thursday | 85°F | Sunny | 1 to 5 mph W | 0% |
| Thursday Night | 61°F | Partly Cloudy | 2 mph S | 8% |
| Friday | 83°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 2 to 6 mph SW | 53% |
| Friday Night | 61°F | Chance Showers And Thunderstorms | 3 mph W | 48% |
| Saturday | 83°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 3 mph W | 19% |
| Saturday Night | 61°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 2 mph W | 15% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 2 to 8 mph SW | 35% |
| Sunday Night | 61°F | Chance Showers And Thunderstorms | 6 mph SW | 37% |
| Monday | 79°F | Chance Rain Showers | 5 to 9 mph W | 51% |
| Monday Night | 56°F | Chance Showers And Thunderstorms | 7 mph W | 48% |
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 Aug 4, 2026.