Winter Harbor, ME Weather & Growing Conditions
This Afternoon
56°F
Partly Sunny
Partly sunny, with a high near 56. Southwest wind around 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 56°F | Partly Sunny | 9 mph SW | 2% |
| Tonight | 52°F | Partly Cloudy | 5 to 8 mph SW | 2% |
| Thursday | 57°F | Mostly Cloudy then Isolated Rain Showers | 9 to 16 mph SW | 18% |
| Thursday Night | 55°F | Chance Rain Showers then Patchy Fog | 10 to 16 mph SW | 42% |
| Friday | 58°F | Patchy Fog then Light Rain Likely | 3 to 9 mph SW | 68% |
| Friday Night | 53°F | Light Rain | 3 to 7 mph S | 90% |
| Saturday | 56°F | Light Rain | 9 mph SE | 89% |
| Saturday Night | 48°F | Light Rain Likely | 7 to 10 mph NE | 68% |
| Sunday | 52°F | Light Rain Likely | 10 to 15 mph NW | 55% |
| Sunday Night | 44°F | Chance Light Rain | 13 mph W | 32% |
| Monday | 50°F | Chance Light Rain | 10 to 16 mph W | 25% |
| Monday Night | 40°F | Slight Chance Light Rain then Partly Cloudy | 14 mph W | 20% |
| Tuesday | 50°F | Mostly Sunny | 12 to 16 mph W | 11% |
| Tuesday Night | 41°F | Partly Cloudy | 12 mph W | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Winter Harbor, ME
Last spring frost
Apr 27
First fall frost
Oct 22
Growing season
177 days
Hardiness zone
6a
Explore more for Winter Harbor, ME: full frost dates · planting calendar · Maine frost dates
Climate data from the nearest NOAA station, Acadia Np, Me (8.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.