Northwest Harwich, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Northwest Harwich, a community in Barnstable County, Massachusetts.
Today
81°F
Mostly Sunny
Mostly sunny, with a high near 81. West wind 3 to 8 mph.
7-day forecast for Northwest Harwich
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Mostly Sunny | 3 to 8 mph W | 0% |
| Tonight | 67°F | Mostly Cloudy then Slight Chance Rain Showers | 2 to 7 mph SW | 16% |
| Wednesday | 81°F | Slight Chance Rain Showers then Mostly Sunny | 2 to 9 mph W | 17% |
| Wednesday Night | 70°F | Mostly Cloudy | 5 to 8 mph SW | 4% |
| Thursday | 84°F | Mostly Sunny | 5 to 12 mph SW | 4% |
| Thursday Night | 72°F | Partly Cloudy | 7 to 10 mph SW | 2% |
| Friday | 84°F | Mostly Sunny | 7 to 12 mph SW | 3% |
| Friday Night | 72°F | Partly Cloudy | 6 to 10 mph SW | 9% |
| Saturday | 83°F | Mostly Sunny | 5 to 9 mph SW | 9% |
| Saturday Night | 72°F | Partly Cloudy | 5 to 9 mph SW | 13% |
| Sunday | 83°F | Mostly Sunny | 5 to 10 mph SW | 11% |
| Sunday Night | 71°F | Partly Cloudy | 6 to 10 mph SW | 9% |
| Monday | 83°F | Mostly Sunny | 6 to 12 mph SW | 9% |
| Monday Night | 70°F | Partly Cloudy | 12 mph SW | 6% |
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 Aug 4, 2026.