Winter Harbor, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winter Harbor, a community in Hancock County, Maine.
Tonight
50°F
Chance Light Rain
A chance of rain before 10pm, then a chance of rain and patchy fog between 10pm and 4am, then patchy fog and a slight chance of rain. Cloudy, with a low around 50. Southeast wind around 7 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Winter Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Chance Light Rain | 7 mph SE | 50% |
| Wednesday | 60°F | Patchy Fog then Partly Sunny | 5 to 10 mph SW | 17% |
| Wednesday Night | 52°F | Partly Cloudy | 3 to 7 mph SW | 4% |
| Thursday | 62°F | Partly Sunny | 7 to 15 mph SW | 12% |
| Thursday Night | 55°F | Chance Light Rain | 7 to 13 mph SW | 29% |
| Friday | 62°F | Light Rain Likely | 7 mph SW | 73% |
| Friday Night | 51°F | Light Rain | 3 to 10 mph SE | 87% |
| Saturday | 57°F | Light Rain | 10 to 14 mph E | 87% |
| Saturday Night | 47°F | Light Rain | 8 to 12 mph NW | 76% |
| Sunday | 55°F | Light Rain Likely | 10 mph W | 58% |
| Sunday Night | 42°F | Chance Light Rain then Mostly Cloudy | 8 mph W | 30% |
| Monday | 52°F | Chance Light Rain | 8 to 13 mph W | 27% |
| Monday Night | 39°F | Chance Light Rain | 10 mph NW | 26% |
| Tuesday | 51°F | Chance Light Rain | 12 to 16 mph W | 26% |
Forecast source: National Weather Service (api.weather.gov) for Winter Harbor (44.393, -68.092). Updated through the day.
Growing snapshot for Winter Harbor
Last spring frost
Apr 27
First fall frost
Oct 22
Growing season
177 days
Hardiness zone
6a
More local growing data for Winter Harbor: nearby ZIP 04693 weather · frost dates · planting calendar · Maine frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Acadia Np, Me (8.2 mi from Winter Harbor). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.