Portland, CT Weather & Growing Conditions
Tonight
51°F
Partly Cloudy
Partly cloudy, with a low around 51. North wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Partly Cloudy | 7 mph N | 0% |
| Saturday | 69°F | Mostly Sunny | 7 mph NE | 0% |
| Saturday Night | 53°F | Mostly Cloudy | 3 to 7 mph SE | 2% |
| Sunday | 66°F | Showers And Thunderstorms | 3 to 10 mph SE | 88% |
| Sunday Night | 55°F | Showers And Thunderstorms | 3 to 12 mph E | 88% |
| Monday | 66°F | Chance Rain Showers | 8 to 12 mph N | 38% |
| Monday Night | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 9 mph NE | 21% |
| Tuesday | 62°F | Slight Chance Rain Showers | 12 mph NE | 19% |
| Tuesday Night | 48°F | Mostly Cloudy | 8 to 12 mph NE | 6% |
| Wednesday | 63°F | Partly Sunny | 12 to 15 mph NE | 12% |
| Wednesday Night | 48°F | Slight Chance Rain Showers | 9 to 14 mph NE | 23% |
| Thursday | 62°F | Chance Rain Showers | 15 mph NE | 30% |
| Thursday Night | 49°F | Chance Rain Showers | 12 mph NE | 32% |
| Friday | 65°F | Chance Rain Showers | 13 mph N | 32% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portland, CT
Last spring frost
Apr 17
First fall frost
Oct 26
Growing season
191 days
Hardiness zone
6b
Explore more for Portland, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Hartford Brainard Fld, Ct (10 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.