South Yarmouth, MA Weather & Growing Conditions
Overnight
54°F
Mostly Cloudy
Mostly cloudy, with a low around 54. North wind around 12 mph, with gusts as high as 24 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Mostly Cloudy | 12 mph N | 0% |
| Saturday | 65°F | Mostly Sunny | 6 to 12 mph NE | 0% |
| Saturday Night | 54°F | Partly Cloudy | 5 mph E | 0% |
| Sunday | 67°F | Mostly Cloudy then Rain Showers Likely | 5 to 9 mph SE | 70% |
| Sunday Night | 56°F | Rain Showers | 5 to 13 mph E | 84% |
| Monday | 66°F | Chance Rain Showers then Mostly Cloudy | 13 to 16 mph N | 43% |
| Monday Night | 54°F | Mostly Cloudy | 8 to 13 mph NE | 3% |
| Tuesday | 65°F | Mostly Cloudy | 13 to 16 mph NE | 7% |
| Tuesday Night | 54°F | Mostly Cloudy | 16 mph NE | 4% |
| Wednesday | 65°F | Partly Sunny | 16 to 20 mph NE | 5% |
| Wednesday Night | 54°F | Mostly Cloudy then Slight Chance Rain Showers | 17 to 21 mph NE | 24% |
| Thursday | 65°F | Chance Rain Showers | 22 mph NE | 36% |
| Thursday Night | 54°F | Chance Rain Showers | 22 mph NE | 43% |
| Friday | 65°F | Chance Rain Showers | 21 to 24 mph NE | 43% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for South Yarmouth, MA
Last spring frost
Apr 13
First fall frost
Nov 3
Growing season
204 days
Hardiness zone
7a
Explore more for South Yarmouth, MA: full frost dates · planting calendar · Massachusetts frost dates
Climate data from the nearest NOAA station, W Harwich, Ma (4.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.