Portland, ME Weather & Growing Conditions
Tonight
50°F
Mostly Cloudy
Mostly cloudy, with a low around 50. North wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Mostly Cloudy | 0 to 5 mph N | 13% |
| Wednesday | 64°F | Mostly Sunny | 5 to 10 mph SW | 6% |
| Wednesday Night | 55°F | Partly Cloudy | 10 mph SW | 3% |
| Thursday | 62°F | Mostly Cloudy then Isolated Rain Showers | 15 mph SW | 20% |
| Thursday Night | 57°F | Mostly Cloudy then Isolated Rain Showers | 10 to 15 mph SW | 23% |
| Friday | 61°F | Light Rain Likely | 5 to 10 mph S | 69% |
| Friday Night | 53°F | Light Rain | 5 to 10 mph E | 85% |
| Saturday | 57°F | Light Rain | 10 to 15 mph N | 79% |
| Saturday Night | 48°F | Light Rain Likely | 10 mph NW | 58% |
| Sunday | 56°F | Chance Light Rain | 10 mph W | 37% |
| Sunday Night | 45°F | Slight Chance Light Rain then Partly Cloudy | 5 to 10 mph W | 16% |
| Monday | 54°F | Slight Chance Light Rain | 10 to 15 mph NW | 23% |
| Monday Night | 43°F | Slight Chance Light Rain | 10 to 15 mph NW | 22% |
| Tuesday | 53°F | Slight Chance Light Rain | 15 mph W | 18% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portland, ME
Last spring frost
Apr 26
First fall frost
Oct 15
Growing season
170 days
Hardiness zone
6a
Explore more for Portland, ME: full frost dates · planting calendar · Maine frost dates
Climate data from the nearest NOAA station, Portland Intl Jetport, Me (12.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.