South Portland, ME Weather & Growing Conditions
This Afternoon
64°F
Cloudy
Cloudy. High near 64, with temperatures falling to around 55 in the afternoon. East wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Cloudy | 5 mph E | 13% |
| Tonight | 46°F | Isolated Rain Showers then Mostly Cloudy | 0 to 5 mph N | 17% |
| Wednesday | 73°F | Mostly Sunny | 0 to 10 mph SW | 6% |
| Wednesday Night | 53°F | Partly Cloudy | 5 mph SW | 3% |
| Thursday | 70°F | Partly Sunny then Isolated Rain Showers | 5 to 15 mph SW | 18% |
| Thursday Night | 57°F | Mostly Cloudy then Isolated Rain Showers | 5 to 10 mph SW | 23% |
| Friday | 67°F | Light Rain Likely | 5 mph S | 69% |
| Friday Night | 50°F | Light Rain | 0 to 5 mph NE | 85% |
| Saturday | 60°F | Light Rain | 5 to 10 mph N | 77% |
| Saturday Night | 42°F | Light Rain Likely | 5 to 10 mph NW | 55% |
| Sunday | 59°F | Chance Light Rain | 5 to 10 mph W | 34% |
| Sunday Night | 35°F | Slight Chance Light Rain then Partly Cloudy | 5 mph W | 15% |
| Monday | 56°F | Slight Chance Light Rain | 5 to 10 mph W | 23% |
| Monday Night | 33°F | Slight Chance Light Rain | 5 to 10 mph NW | 22% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for South Portland, ME
Last spring frost
Apr 26
First fall frost
Oct 15
Growing season
170 days
Hardiness zone
6a
Explore more for South Portland, ME: full frost dates · planting calendar · Maine frost dates
Climate data from the nearest NOAA station, Portland Intl Jetport, Me (1.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.