Northwest Harwich, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Northwest Harwich, a community in Barnstable County, Massachusetts.
This Afternoon
65°F
Mostly Sunny
Mostly sunny. High near 65, with temperatures falling to around 56 in the afternoon. Southwest wind around 9 mph.
7-day forecast for Northwest Harwich
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Mostly Sunny | 9 mph SW | 2% |
| Tonight | 52°F | Mostly Cloudy | 7 mph SW | 9% |
| Wednesday | 67°F | Sunny | 6 to 12 mph SW | 6% |
| Wednesday Night | 55°F | Partly Cloudy | 8 mph SW | 3% |
| Thursday | 67°F | Partly Sunny | 6 to 12 mph SW | 4% |
| Thursday Night | 58°F | Mostly Cloudy then Chance Light Rain | 9 mph SW | 53% |
| Friday | 66°F | Light Rain | 10 mph S | 84% |
| Friday Night | 54°F | Rain | 7 mph S | 87% |
| Saturday | 63°F | Light Rain | 7 to 10 mph SW | 84% |
| Saturday Night | 45°F | Light Rain Likely | 7 mph NW | 56% |
| Sunday | 58°F | Chance Light Rain | 7 to 10 mph W | 30% |
| Sunday Night | 41°F | Partly Cloudy | 6 mph W | 13% |
| Monday | 56°F | Chance Light Rain | 7 to 13 mph W | 28% |
| Monday Night | 39°F | Chance Light Rain | 10 mph W | 28% |
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 Nov 3, 2026.