South Portland, ME Weather & Growing Conditions
Today
88°F
Sunny
Sunny, with a high near 88. West wind 5 to 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Sunny | 5 to 15 mph W | 0% |
| Tonight | 61°F | Mostly Clear | 5 to 10 mph SW | 0% |
| Wednesday | 85°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 66°F | Partly Cloudy | 0 to 10 mph SW | 5% |
| Thursday | 88°F | Sunny | 0 to 10 mph SW | 13% |
| Thursday Night | 70°F | Partly Cloudy | 0 to 5 mph SW | 12% |
| Friday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph SW | 28% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 28% |
| Saturday | 86°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 42% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SW | 37% |
| Sunday | 88°F | Sunny | 0 to 10 mph SW | 5% |
| Sunday Night | 69°F | Mostly Clear | 5 to 10 mph SW | 6% |
| Monday | 89°F | Sunny | 5 to 10 mph SW | 13% |
| Monday Night | 67°F | Partly Cloudy | 5 to 10 mph W | 14% |
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 Aug 4, 2026.