Northwest Harwich, MA Weather & Growing Conditions
Tonight
55°F
Partly Cloudy
Partly cloudy, with a low around 55. North wind 8 to 13 mph, with gusts as high as 24 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Partly Cloudy | 8 to 13 mph N | 0% |
| Saturday | 64°F | Mostly Sunny | 7 to 12 mph NE | 0% |
| Saturday Night | 45°F | Partly Cloudy | 5 mph E | 0% |
| Sunday | 67°F | Mostly Cloudy then Chance Rain Showers | 5 to 10 mph SE | 49% |
| Sunday Night | 57°F | Rain Showers | 6 to 9 mph E | 88% |
| Monday | 66°F | Rain Showers Likely | 10 to 16 mph NE | 66% |
| Monday Night | 54°F | Slight Chance Rain Showers | 12 to 16 mph NE | 19% |
| Tuesday | 65°F | Slight Chance Rain Showers then Mostly Cloudy | 17 mph NE | 18% |
| Tuesday Night | 55°F | Mostly Cloudy | 17 to 21 mph NE | 8% |
| Wednesday | 65°F | Partly Sunny | 21 mph NE | 12% |
| Wednesday Night | 55°F | Mostly Cloudy then Slight Chance Rain Showers | 22 mph NE | 22% |
| Thursday | 65°F | Chance Rain Showers | 23 mph NE | 31% |
| Thursday Night | 55°F | Chance Rain Showers | 21 mph NE | 41% |
| Friday | 66°F | Chance Rain Showers | 21 mph N | 40% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Northwest Harwich, MA
Last spring frost
Apr 13
First fall frost
Nov 3
Growing season
204 days
Hardiness zone
7b
Explore more for Northwest Harwich, MA: full frost dates · planting calendar · Massachusetts frost dates
Climate data from the nearest NOAA station, W Harwich, Ma (0.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.