Portland, ME Weather & Growing Conditions
This Afternoon
57°F
Mostly Cloudy
Mostly cloudy, with a high near 57. East wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 57°F | Mostly Cloudy | 5 mph E | 14% |
| Tonight | 46°F | Slight Chance Light Rain then Mostly Cloudy | 0 to 5 mph NE | 16% |
| Wednesday | 71°F | Mostly Sunny | 0 to 10 mph SW | 6% |
| Wednesday Night | 51°F | Partly Cloudy | 5 mph SW | 1% |
| Thursday | 69°F | Partly Sunny then Slight Chance Light Rain | 10 to 15 mph SW | 20% |
| Thursday Night | 55°F | Slight Chance Light Rain | 5 to 10 mph SW | 18% |
| Friday | 67°F | Light Rain Likely | 5 mph S | 65% |
| Friday Night | 48°F | Light Rain | 5 to 10 mph E | 82% |
| Saturday | 60°F | Light Rain | 5 to 10 mph NE | 75% |
| Saturday Night | 41°F | Chance Light Rain | 0 to 5 mph N | 54% |
| Sunday | 58°F | Chance Light Rain | 5 mph NW | 38% |
| Sunday Night | 38°F | Slight Chance Light Rain then Partly Cloudy | 0 to 5 mph NW | 16% |
| Monday | 57°F | Chance Light Rain | 5 mph W | 33% |
| Monday Night | 36°F | Chance Light Rain | 5 to 10 mph NW | 36% |
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 (0.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.