Mystic, CT Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Mystic, a community in New London County, Connecticut.

Today

80°F

Mostly Sunny

Mostly sunny. High near 80, with temperatures falling to around 78 in the afternoon. West wind 2 to 6 mph.

7-day forecast for Mystic

When	Temp	Forecast	Wind	Precip
Today	80°F	Mostly Sunny	2 to 6 mph W	0%
Tonight	62°F	Mostly Cloudy	3 mph N	12%
Wednesday	80°F	Mostly Sunny	2 to 6 mph SW	9%
Wednesday Night	69°F	Mostly Cloudy then Slight Chance Rain Showers	5 mph SW	17%
Thursday	83°F	Mostly Sunny	3 to 9 mph SW	12%
Thursday Night	72°F	Partly Cloudy	5 to 8 mph SW	12%
Friday	84°F	Sunny	5 to 9 mph SW	10%
Friday Night	71°F	Slight Chance Showers And Thunderstorms	2 to 8 mph SW	18%
Saturday	82°F	Mostly Sunny then Slight Chance Showers And Thunderstorms	2 to 9 mph SW	18%
Saturday Night	71°F	Slight Chance Showers And Thunderstorms	2 to 6 mph SW	21%
Sunday	83°F	Mostly Sunny	3 to 8 mph W	11%
Sunday Night	71°F	Mostly Clear	3 to 7 mph SW	7%
Monday	84°F	Sunny	3 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) 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

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

All Connecticut locations ›

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 Aug 4, 2026.