Mystic, CT Weather & Growing Conditions
This Afternoon
68°F
Mostly Sunny
Mostly sunny. High near 68, with temperatures falling to around 65 in the afternoon. East wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Mostly Sunny | 7 mph E | 0% |
| Tonight | 51°F | Partly Cloudy | 6 mph E | 0% |
| Sunday | 66°F | Rain | 3 to 8 mph SE | 89% |
| Sunday Night | 53°F | Rain | 7 mph E | 89% |
| Monday | 66°F | Chance Light Rain | 8 to 12 mph NE | 39% |
| Monday Night | 48°F | Mostly Cloudy | 5 to 9 mph NE | 5% |
| Tuesday | 63°F | Mostly Cloudy | 9 to 13 mph NE | 8% |
| Tuesday Night | 48°F | Mostly Cloudy | 8 to 13 mph NE | 6% |
| Wednesday | 64°F | Partly Sunny | 14 to 17 mph NE | 5% |
| Wednesday Night | 48°F | Chance Rain Showers | 13 to 16 mph NE | 26% |
| Thursday | 64°F | Chance Rain Showers | 17 to 21 mph NE | 34% |
| Thursday Night | 49°F | Chance Rain Showers | 14 to 18 mph NE | 38% |
| Friday | 64°F | Chance Rain Showers | 20 mph N | 34% |
| Friday Night | 49°F | Chance Rain Showers | 17 mph N | 35% |
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 Sep 19, 2026.