Harwich Port, MA Weather & Growing Conditions
This Afternoon
63°F
Mostly Sunny
Mostly sunny, with a high near 63. Northeast wind 7 to 12 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Mostly Sunny | 7 to 12 mph NE | 0% |
| Tonight | 55°F | Partly Cloudy | 6 mph E | 0% |
| Sunday | 67°F | Mostly Cloudy then Rain Showers Likely | 7 to 12 mph SE | 69% |
| Sunday Night | 57°F | Rain Showers | 7 to 14 mph E | 84% |
| Monday | 66°F | Chance Rain Showers then Mostly Cloudy | 14 to 18 mph N | 43% |
| Monday Night | 55°F | Mostly Cloudy | 12 to 15 mph NE | 3% |
| Tuesday | 64°F | Mostly Cloudy | 17 mph NE | 7% |
| Tuesday Night | 55°F | Mostly Cloudy | 16 to 21 mph NE | 4% |
| Wednesday | 64°F | Partly Sunny | 22 mph NE | 5% |
| Wednesday Night | 55°F | Mostly Cloudy then Slight Chance Rain Showers | 21 to 26 mph NE | 24% |
| Thursday | 65°F | Chance Rain Showers | 28 mph NE | 36% |
| Thursday Night | 55°F | Chance Rain Showers | 28 mph NE | 44% |
| Friday | 65°F | Chance Rain Showers | 29 mph NE | 43% |
| Friday Night | 55°F | Chance Showers And Thunderstorms | 29 mph NE | 46% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Harwich Port, MA
Last spring frost
Apr 13
First fall frost
Nov 3
Growing season
204 days
Hardiness zone
7b
Explore more for Harwich Port, MA: full frost dates · planting calendar · Massachusetts frost dates
Climate data from the nearest NOAA station, W Harwich, Ma (2.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.