Belfast, ME Weather & Growing Conditions
Tonight
43°F
Mostly Clear
Mostly clear, with a low around 43. Northwest wind 5 to 10 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 43°F | Mostly Clear | 5 to 10 mph NW | 0% |
| Saturday | 62°F | Sunny | 5 to 10 mph NW | 0% |
| Saturday Night | 44°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 60°F | Mostly Cloudy then Chance Rain Showers | 0 to 10 mph S | 32% |
| Sunday Night | 46°F | Chance Rain Showers | 0 to 5 mph SW | 40% |
| Monday | 63°F | Sunny | 5 to 10 mph N | 6% |
| Monday Night | 43°F | Partly Cloudy | 5 to 10 mph N | 0% |
| Tuesday | 61°F | Mostly Sunny | 5 to 10 mph NE | 1% |
| Tuesday Night | 42°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Wednesday | 62°F | Sunny | 5 mph E | 1% |
| Wednesday Night | 42°F | Partly Cloudy | 0 to 5 mph E | 5% |
| Thursday | 61°F | Mostly Sunny then Slight Chance Rain Showers | 5 mph NE | 17% |
| Thursday Night | 45°F | Chance Rain Showers | 5 mph NE | 25% |
| Friday | 62°F | Chance Rain Showers | 5 to 10 mph N | 28% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Belfast, ME
Last spring frost
Apr 27
First fall frost
Oct 19
Growing season
175 days
Hardiness zone
5b
Explore more for Belfast, ME: full frost dates · planting calendar · Maine frost dates
Climate data from the nearest NOAA station, W Rockport 1 Nnw, Me (15.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.