Portland, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portland, a city in Cumberland County, Maine.
This Afternoon
71°F
Sunny
Sunny, with a high near 71. Northwest wind around 15 mph.
7-day forecast for Portland
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Sunny | 15 mph NW | 0% |
| Tonight | 51°F | Partly Cloudy | 10 to 15 mph N | 0% |
| Saturday | 59°F | Sunny | 5 to 10 mph E | 0% |
| Saturday Night | 53°F | Partly Cloudy | 5 to 10 mph S | 0% |
| Sunday | 58°F | Chance Rain Showers | 5 to 15 mph S | 49% |
| Sunday Night | 54°F | Rain Showers Likely | 5 to 10 mph NE | 64% |
| Monday | 60°F | Mostly Sunny | 5 to 15 mph NE | 12% |
| Monday Night | 50°F | Partly Cloudy | 5 to 10 mph NE | 3% |
| Tuesday | 58°F | Partly Sunny | 5 to 15 mph NE | 1% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 10 mph NE | 1% |
| Wednesday | 57°F | Mostly Sunny | 10 to 15 mph NE | 1% |
| Wednesday Night | 50°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Thursday | 57°F | Chance Rain Showers | 10 to 15 mph NE | 25% |
| Thursday Night | 52°F | Chance Rain Showers | 5 to 10 mph NE | 26% |
Forecast source: National Weather Service (api.weather.gov) for Portland (43.633, -70.185). Updated through the day.
Growing snapshot for Portland
Last spring frost
Apr 26
First fall frost
Oct 15
Growing season
170 days
Hardiness zone
6a
More local growing data for Portland: nearby ZIP 04108 weather · frost dates · planting calendar · Maine frost dates
Nearby towns & communities
Bridgton
Brunswick
Casco
Cousins Island
Cumberland Center
Dunstan
Falmouth
Falmouth Foreside
Freeport
Gorham
Gray
Little Falls
Littlejohn Island
Naples
North Windham
Oak Hill
South Portland
South Windham
Standish
Steep Falls
Westbrook
Yarmouth
Climate data from the nearest NOAA station, Portland Intl Jetport, Me (5.7 mi from Portland). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.