Harwich Port, MA Weather & Growing Conditions
Overnight
52°F
Mostly Cloudy
Mostly cloudy, with a low around 52. Southwest wind around 8 mph.
7-day forecast
| 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). 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 Nov 4, 2026.