Mystic, CT Weather & Growing Conditions
Today
81°F
Mostly Sunny
Mostly sunny. High near 81, with temperatures falling to around 79 in the afternoon. West wind 2 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Mostly Sunny | 2 to 6 mph W | 0% |
| Tonight | 61°F | Mostly Cloudy | 5 mph N | 12% |
| Wednesday | 81°F | Mostly Sunny | 2 to 6 mph W | 9% |
| Wednesday Night | 69°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph SW | 16% |
| Thursday | 84°F | Mostly Sunny | 3 to 9 mph SW | 12% |
| Thursday Night | 72°F | Partly Cloudy | 3 to 8 mph SW | 12% |
| Friday | 86°F | Sunny | 3 to 9 mph SW | 11% |
| Friday Night | 71°F | Slight Chance Showers And Thunderstorms | 2 to 7 mph SW | 19% |
| Saturday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 8 mph SW | 20% |
| Saturday Night | 71°F | Slight Chance Showers And Thunderstorms | 2 to 6 mph SW | 21% |
| Sunday | 85°F | Mostly Sunny | 2 to 8 mph W | 11% |
| Sunday Night | 71°F | Mostly Clear | 2 to 7 mph SW | 7% |
| Monday | 86°F | Sunny | 2 to 10 mph SW | 10% |
| Monday Night | 69°F | Mostly Clear | 3 to 8 mph W | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mystic, CT
Last spring frost
Apr 8
First fall frost
Nov 2
Growing season
207 days
Hardiness zone
7a
Explore more for Mystic, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Groton, Ct (3.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.