Portland, CT Weather & Growing Conditions
Today
83°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny, with a high near 83. West wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Patchy Fog then Sunny | 3 mph W | 0% |
| Tonight | 62°F | Mostly Cloudy | 3 mph SW | 3% |
| Wednesday | 83°F | Partly Sunny | 5 mph W | 7% |
| Wednesday Night | 69°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph S | 16% |
| Thursday | 87°F | Chance Showers And Thunderstorms | 2 to 8 mph SW | 37% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 to 7 mph S | 32% |
| Friday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph SW | 37% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 0 to 6 mph SW | 35% |
| Saturday | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 7 mph SW | 40% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 1 to 5 mph SW | 40% |
| Sunday | 87°F | Mostly Sunny | 1 to 6 mph W | 12% |
| Sunday Night | 70°F | Mostly Clear | 1 to 5 mph SW | 12% |
| Monday | 88°F | Sunny then Slight Chance Showers And Thunderstorms | 1 to 9 mph W | 15% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms | 2 to 8 mph W | 15% |
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 Aug 4, 2026.