Belfast, ME Weather & Growing Conditions
This Afternoon
85°F
Sunny
Sunny, with a high near 85. West wind 10 to 15 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Sunny | 10 to 15 mph W | 0% |
| Tonight | 61°F | Mostly Clear | 0 to 10 mph W | 1% |
| Wednesday | 87°F | Mostly Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 64°F | Partly Cloudy | 0 to 5 mph SW | 2% |
| Thursday | 88°F | Sunny | 0 to 5 mph S | 3% |
| Thursday Night | 67°F | Partly Cloudy | 0 to 5 mph S | 3% |
| Friday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 26% |
| Friday Night | 68°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 26% |
| Saturday | 87°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 35% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph W | 32% |
| Sunday | 88°F | Sunny | 0 to 5 mph W | 11% |
| Sunday Night | 66°F | Mostly Clear | 0 to 5 mph SW | 10% |
| Monday | 87°F | Mostly Sunny then Slight Chance Rain Showers | 0 to 10 mph W | 17% |
| Monday Night | 64°F | Slight Chance Rain Showers | 0 to 5 mph W | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Belfast, ME
Last spring frost
May 7
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
5b
Explore more for Belfast, ME: full frost dates · planting calendar · Maine frost dates
Climate data from the nearest NOAA station, Belfast, Me (5.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.