Northwest Harwich, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Northwest Harwich, a community in Barnstable County, Massachusetts.
Overnight
55°F
Mostly Clear
Mostly clear, with a low around 55. Southwest wind around 1 mph.
7-day forecast for Northwest Harwich
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Mostly Clear | 1 mph SW | 0% |
| Saturday | 65°F | Mostly Sunny | 6 to 12 mph NE | 0% |
| Saturday Night | 54°F | Partly Cloudy | 5 mph E | 0% |
| Sunday | 67°F | Mostly Cloudy then Rain Showers Likely | 5 to 9 mph SE | 70% |
| Sunday Night | 55°F | Rain Showers | 5 to 13 mph E | 83% |
| Monday | 67°F | Chance Rain Showers then Mostly Cloudy | 13 to 16 mph N | 42% |
| Monday Night | 54°F | Mostly Cloudy | 8 to 13 mph NE | 3% |
| Tuesday | 66°F | Mostly Cloudy | 15 mph NE | 6% |
| Tuesday Night | 54°F | Mostly Cloudy | 13 to 16 mph NE | 4% |
| Wednesday | 66°F | Partly Sunny | 18 mph NE | 5% |
| Wednesday Night | 54°F | Mostly Cloudy then Slight Chance Rain Showers | 17 to 21 mph NE | 24% |
| Thursday | 66°F | Chance Rain Showers | 22 mph NE | 36% |
| Thursday Night | 54°F | Chance Rain Showers | 21 mph NE | 44% |
| Friday | 66°F | Chance Rain Showers | 21 to 24 mph NE | 43% |
Forecast source: National Weather Service (api.weather.gov) for Northwest Harwich (41.694, -70.105). Updated through the day.
Growing snapshot for Northwest Harwich
Last spring frost
Apr 13
First fall frost
Nov 3
Growing season
204 days
Hardiness zone
7b
More local growing data for Northwest Harwich: nearby ZIP 02671 weather · frost dates · planting calendar · Massachusetts frost dates
Nearby towns & communities
Barnstable Town
Bourne
Brewster
Buzzards Bay
Chatham
Dennis
Dennis Port
East Dennis
East Falmouth
East Harwich
East Sandwich
Falmouth
Forestdale
Harwich Center
Harwich Port
Mashpee Neck
Monomoscoy Island
Monument Beach
New Seabury
North Eastham
North Falmouth
Orleans
Pocasset
Popponesset
Popponesset Island
Provincetown
Sagamore
Sandwich
Seabrook
Seconsett Island
Climate data from the nearest NOAA station, W Harwich, Ma (0.6 mi from Northwest Harwich). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.