Mystic, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mystic, a community in New London County, Connecticut.
Tonight
53°F
Partly Cloudy
Partly cloudy, with a low around 53. North wind 3 to 12 mph.
7-day forecast for Mystic
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Partly Cloudy | 3 to 12 mph N | 0% |
| Saturday | 67°F | Mostly Sunny | 12 mph E | 0% |
| Saturday Night | 54°F | Mostly Cloudy | 6 to 9 mph SE | 0% |
| Sunday | 67°F | Showers And Thunderstorms | 7 to 12 mph SE | 79% |
| Sunday Night | 57°F | Showers And Thunderstorms | 5 to 12 mph E | 90% |
| Monday | 66°F | Rain Showers Likely | 13 mph NE | 61% |
| Monday Night | 53°F | Slight Chance Rain Showers | 7 to 13 mph NE | 23% |
| Tuesday | 63°F | Slight Chance Rain Showers | 16 mph NE | 20% |
| Tuesday Night | 52°F | Mostly Cloudy | 12 to 16 mph NE | 10% |
| Wednesday | 63°F | Partly Sunny then Slight Chance Rain Showers | 16 to 20 mph NE | 15% |
| Wednesday Night | 52°F | Chance Rain Showers | 14 to 18 mph NE | 26% |
| Thursday | 63°F | Chance Rain Showers | 20 mph NE | 32% |
| Thursday Night | 52°F | Chance Rain Showers | 12 to 16 mph NE | 38% |
| Friday | 66°F | Chance Rain Showers | 13 to 16 mph N | 35% |
Forecast source: National Weather Service (api.weather.gov) for Mystic (41.356, -71.956). Updated through the day.
Growing snapshot for Mystic
Last spring frost
Apr 8
First fall frost
Nov 2
Growing season
207 days
Hardiness zone
7a
More local growing data for Mystic: nearby ZIP 06355 weather · frost dates · planting calendar · Connecticut frost dates
Nearby towns & communities
Baltic
Colchester
Conning Towers-Nautilus Park
Gales Ferry
Groton
Groton Long Point
Jewett City
Long Hill
Mashantucket
New London
Niantic
Noank
Norwich
Old Mystic
Oxoboxo River
Pawcatuck
Poquonock Bridge
Stonington
Waterford
Climate data from the nearest NOAA station, Groton, Ct (3.6 mi from Mystic). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.