Winter Harbor, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winter Harbor, a community in Hancock County, Maine.
Overnight
48°F
Clear
Clear, with a low around 48. Northwest wind around 13 mph, with gusts as high as 23 mph.
7-day forecast for Winter Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Clear | 13 mph NW | 0% |
| Saturday | 62°F | Sunny | 6 to 9 mph NW | 0% |
| Saturday Night | 49°F | Partly Cloudy | 5 mph E | 0% |
| Sunday | 60°F | Partly Sunny then Slight Chance Light Rain | 3 to 10 mph SE | 15% |
| Sunday Night | 50°F | Chance Light Rain | 2 to 7 mph SW | 39% |
| Monday | 63°F | Patchy Fog then Mostly Sunny | 3 to 7 mph N | 10% |
| Monday Night | 46°F | Partly Cloudy | 8 mph N | 0% |
| Tuesday | 59°F | Mostly Sunny | 5 to 9 mph NE | 1% |
| Tuesday Night | 46°F | Partly Cloudy | 2 to 6 mph NE | 1% |
| Wednesday | 59°F | Sunny | 6 to 9 mph NE | 0% |
| Wednesday Night | 46°F | Partly Cloudy | 5 mph NE | 3% |
| Thursday | 59°F | Mostly Sunny then Slight Chance Rain Showers | 5 to 8 mph NE | 16% |
| Thursday Night | 48°F | Chance Rain Showers | 7 mph NE | 28% |
| Friday | 61°F | Chance Rain Showers | 7 to 10 mph NE | 32% |
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 Sep 19, 2026.