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Belfast, ME Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Belfast, a city in Waldo County, Maine.

Today
64°F
Sunny
Sunny, with a high near 64. North wind 0 to 10 mph.

7-day forecast for Belfast

WhenTempForecastWindPrecip
Today 64°F Sunny 0 to 10 mph N 0%
Tonight 43°F Partly Cloudy 0 mph 0%
Sunday 62°F Mostly Cloudy then Rain Showers Likely 0 to 10 mph S 55%
Sunday Night 43°F Light Rain Likely then Rain Showers Likely 0 to 5 mph E 64%
Monday 64°F Mostly Sunny 5 to 10 mph N 4%
Monday Night 41°F Partly Cloudy 5 to 10 mph N 0%
Tuesday 63°F Mostly Sunny 5 to 10 mph N 0%
Tuesday Night 41°F Partly Cloudy 0 to 5 mph N 0%
Wednesday 63°F Sunny 5 mph E 0%
Wednesday Night 41°F Partly Cloudy 0 to 5 mph NE 1%
Thursday 63°F Slight Chance Rain Showers 0 to 5 mph NE 19%
Thursday Night 43°F Chance Rain Showers 0 to 15 mph NE 30%
Friday 64°F Chance Rain Showers 10 to 15 mph N 29%
Friday Night 45°F Chance Rain Showers 10 to 15 mph NE 29%

Forecast source: National Weather Service (api.weather.gov) for Belfast (44.426, -69.026). Updated through the day.

Growing snapshot for Belfast

Last spring frost
May 7
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
5b

More local growing data for Belfast: nearby ZIP 04915 weather · frost dates · planting calendar · Maine frost dates

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Climate data from the nearest NOAA station, Belfast, Me (5.3 mi from Belfast). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.