Harwich Port, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harwich Port, a community in Barnstable County, Massachusetts.
Overnight
52°F
Mostly Cloudy
Mostly cloudy, with a low around 52. Southwest wind around 8 mph.
7-day forecast for Harwich Port
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Mostly Cloudy | 8 mph SW | 2% |
| Wednesday | 65°F | Sunny | 8 to 13 mph SW | 4% |
| Wednesday Night | 57°F | Partly Cloudy then Patchy Fog | 10 mph SW | 3% |
| Thursday | 66°F | Patchy Fog | 8 to 13 mph SW | 2% |
| Thursday Night | 58°F | Light Rain Likely | 12 mph SW | 58% |
| Friday | 65°F | Light Rain | 12 mph S | 92% |
| Friday Night | 55°F | Light Rain | 9 mph S | 96% |
| Saturday | 62°F | Light Rain | 8 to 12 mph S | 89% |
| Saturday Night | 46°F | Slight Chance T-storms | 12 mph W | 23% |
| Sunday | 57°F | Slight Chance Light Rain then Mostly Sunny | 13 mph W | 18% |
| Sunday Night | 44°F | Partly Cloudy | 10 mph W | 10% |
| Monday | 56°F | Chance Light Rain | 10 to 14 mph W | 31% |
| Monday Night | 41°F | Chance Light Rain then Partly Cloudy | 13 mph W | 25% |
| Tuesday | 56°F | Sunny | 13 to 16 mph W | 7% |
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 Nov 4, 2026.