Harwich Port, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harwich Port, a community in Barnstable County, Massachusetts.
This Afternoon
75°F
Sunny
Sunny, with a high near 75. North wind around 7 mph.
7-day forecast for Harwich Port
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 7 mph N | 0% |
| Tonight | 55°F | Partly Cloudy | 2 to 14 mph N | 0% |
| Saturday | 63°F | Mostly Sunny | 7 to 13 mph NE | 0% |
| Saturday Night | 46°F | Partly Cloudy | 6 mph E | 0% |
| Sunday | 66°F | Mostly Cloudy then Chance Rain Showers | 6 to 10 mph SE | 48% |
| Sunday Night | 59°F | Rain Showers | 9 mph E | 88% |
| Monday | 65°F | Rain Showers Likely | 10 to 17 mph NE | 67% |
| Monday Night | 55°F | Slight Chance Rain Showers | 13 to 17 mph NE | 19% |
| Tuesday | 64°F | Slight Chance Rain Showers then Mostly Cloudy | 18 mph NE | 18% |
| Tuesday Night | 56°F | Mostly Cloudy | 18 to 22 mph NE | 8% |
| Wednesday | 64°F | Partly Sunny | 23 mph NE | 12% |
| Wednesday Night | 56°F | Mostly Cloudy then Slight Chance Rain Showers | 21 to 25 mph NE | 22% |
| Thursday | 65°F | Chance Rain Showers | 22 to 25 mph NE | 31% |
| Thursday Night | 55°F | Chance Rain Showers | 23 mph NE | 41% |
Forecast source: National Weather Service (api.weather.gov) for Harwich Port (41.673, -70.065). Updated through the day.
Growing snapshot for Harwich Port
Last spring frost
Apr 13
First fall frost
Nov 3
Growing season
204 days
Hardiness zone
7b
More local growing data for Harwich Port: nearby ZIP 02646 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
Mashpee Neck
Monomoscoy Island
Monument Beach
New Seabury
North Eastham
North Falmouth
Northwest Harwich
Orleans
Pocasset
Popponesset
Popponesset Island
Provincetown
Sagamore
Sandwich
Seabrook
Seconsett Island
Climate data from the nearest NOAA station, W Harwich, Ma (2.4 mi from Harwich Port). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.