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East Harwich, MA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for East Harwich, a community in Barnstable County, Massachusetts.

Tonight
49°F
Partly Cloudy
Partly cloudy, with a low around 49. East wind around 5 mph.

7-day forecast for East Harwich

WhenTempForecastWindPrecip
Tonight 49°F Partly Cloudy 5 mph E 0%
Sunday 65°F Mostly Cloudy then Rain Showers 5 to 12 mph SE 96%
Sunday Night 60°F Rain Showers 5 to 10 mph E 96%
Monday 67°F Chance Rain Showers then Mostly Cloudy 8 to 15 mph NE 50%
Monday Night 55°F Mostly Cloudy 8 to 12 mph NE 2%
Tuesday 66°F Partly Sunny 14 mph NE 4%
Tuesday Night 55°F Mostly Cloudy 12 to 15 mph NE 3%
Wednesday 66°F Partly Sunny 17 mph NE 4%
Wednesday Night 54°F Mostly Cloudy then Slight Chance Rain Showers 15 to 18 mph NE 17%
Thursday 67°F Chance Rain Showers 20 mph NE 31%
Thursday Night 55°F Chance Rain Showers 22 mph NE 42%
Friday 67°F Chance Rain Showers 23 mph NE 46%
Friday Night 54°F Chance Rain Showers 23 mph NE 45%
Saturday 67°F Chance Rain Showers 21 mph NE 42%

Forecast source: National Weather Service (api.weather.gov) for East Harwich (41.709, -70.032). Updated through the day.

Growing snapshot for East Harwich

Last spring frost
Apr 13
First fall frost
Nov 4
Growing season
206 days
Hardiness zone
7b

More local growing data for East Harwich: nearby ZIP 02659 weather · frost dates · planting calendar · Massachusetts frost dates

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Climate data from the nearest NOAA station, Chatham Muni Ap, Ma (1.6 mi from East Harwich). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.