Mystic, CT Weather & Growing Conditions
This Afternoon
81°F
Mostly Sunny
Mostly sunny. High near 81, with temperatures falling to around 78 in the afternoon. South wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 81°F | Mostly Sunny | 6 mph S | 0% |
| Tonight | 61°F | Mostly Cloudy | 5 mph NW | 12% |
| Wednesday | 80°F | Mostly Sunny | 2 to 7 mph SW | 9% |
| Wednesday Night | 69°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph SW | 16% |
| Thursday | 84°F | Mostly Sunny | 3 to 10 mph SW | 12% |
| Thursday Night | 72°F | Partly Cloudy | 3 to 8 mph SW | 11% |
| Friday | 86°F | Sunny | 5 to 9 mph SW | 10% |
| Friday Night | 71°F | Slight Chance Showers And Thunderstorms | 2 to 8 mph SW | 18% |
| Saturday | 84°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 9 mph SW | 20% |
| Saturday Night | 71°F | Slight Chance Showers And Thunderstorms | 2 to 7 mph SW | 21% |
| Sunday | 85°F | Mostly Sunny | 2 to 8 mph W | 10% |
| Sunday Night | 71°F | Mostly Clear | 2 to 7 mph SW | 7% |
| Monday | 86°F | Sunny | 2 to 10 mph SW | 9% |
| 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 11
First fall frost
Oct 31
Growing season
201 days
Hardiness zone
7a
Explore more for Mystic, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Westerly State Ap, Ri (6.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.