Portland, ME Weather & Growing Conditions
Today
73°F
Sunny
Sunny, with a high near 73. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Sunny | 10 to 15 mph SW | 0% |
| Tonight | 63°F | Mostly Clear | 5 to 15 mph SW | 0% |
| Wednesday | 72°F | Mostly Sunny | 5 to 10 mph SW | 0% |
| Wednesday Night | 64°F | Mostly Cloudy | 5 to 10 mph SW | 5% |
| Thursday | 73°F | Mostly Sunny | 5 to 10 mph SW | 6% |
| Thursday Night | 66°F | Partly Cloudy | 5 to 10 mph SW | 5% |
| Friday | 76°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 22% |
| Friday Night | 67°F | Slight Chance Showers And Thunderstorms | 0 to 10 mph W | 22% |
| Saturday | 74°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 10 mph W | 37% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SW | 33% |
| Sunday | 74°F | Mostly Sunny | 0 to 15 mph SW | 5% |
| Sunday Night | 67°F | Mostly Clear | 5 to 10 mph SW | 7% |
| Monday | 77°F | Mostly Sunny | 5 to 15 mph SW | 11% |
| Monday Night | 66°F | Slight Chance Rain Showers | 5 to 15 mph W | 16% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portland, ME
Last spring frost
May 2
First fall frost
Oct 10
Growing season
160 days
Hardiness zone
6a
Explore more for Portland, ME: full frost dates · planting calendar · Maine frost dates
Climate data from the nearest NOAA station, Brunswick Nas, Me (11.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.