Niantic, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Niantic, a community in New London County, Connecticut.
Today
68°F
Mostly Sunny
Mostly sunny. High near 68, with temperatures falling to around 66 in the afternoon. East wind around 9 mph.
7-day forecast for Niantic
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Mostly Sunny | 9 mph E | 0% |
| Tonight | 52°F | Partly Cloudy | 3 to 7 mph SE | 0% |
| Sunday | 68°F | Rain | 5 to 9 mph SE | 91% |
| Sunday Night | 54°F | Rain | 6 to 10 mph E | 91% |
| Monday | 68°F | Chance Light Rain | 7 to 12 mph NE | 39% |
| Monday Night | 50°F | Mostly Cloudy | 5 to 10 mph NE | 7% |
| Tuesday | 65°F | Mostly Cloudy | 14 mph NE | 11% |
| Tuesday Night | 51°F | Mostly Cloudy | 10 to 16 mph NE | 7% |
| Wednesday | 65°F | Partly Sunny | 17 to 22 mph NE | 7% |
| Wednesday Night | 51°F | Chance Rain Showers | 17 to 21 mph NE | 26% |
| Thursday | 64°F | Chance Rain Showers | 21 to 24 mph NE | 33% |
| Thursday Night | 51°F | Chance Rain Showers | 15 to 21 mph NE | 36% |
| Friday | 65°F | Chance Rain Showers | 20 to 23 mph N | 34% |
| Friday Night | 52°F | Chance Rain Showers | 16 to 20 mph N | 35% |
Forecast source: National Weather Service (api.weather.gov) for Niantic (41.317, -72.200). Updated through the day.
Growing snapshot for Niantic
Last spring frost
Apr 16
First fall frost
Oct 28
Growing season
194 days
Hardiness zone
7a
More local growing data for Niantic: nearby ZIP 06357 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
Mystic
New London
Noank
Norwich
Old Mystic
Oxoboxo River
Pawcatuck
Poquonock Bridge
Stonington
Waterford
Climate data from the nearest NOAA station, Groton New London Ap, Ct (8.8 mi from Niantic). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.