South Yarmouth, MA Weather & Growing Conditions
This Afternoon
69°F
Sunny
Sunny. High near 69, with temperatures falling to around 59 in the afternoon. Southwest wind around 13 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Sunny | 13 mph SW | 3% |
| Tonight | 57°F | Partly Cloudy then Patchy Fog | 8 mph SW | 3% |
| Thursday | 67°F | Patchy Fog then Partly Sunny | 7 to 12 mph SW | 2% |
| Thursday Night | 58°F | Light Rain Likely | 9 mph SW | 60% |
| Friday | 66°F | Light Rain | 10 mph S | 93% |
| Friday Night | 55°F | Light Rain | 8 mph S | 97% |
| Saturday | 63°F | Light Rain | 9 mph SW | 88% |
| Saturday Night | 45°F | Slight Chance T-storms | 8 mph W | 21% |
| Sunday | 58°F | Slight Chance Light Rain then Mostly Sunny | 10 mph W | 17% |
| Sunday Night | 42°F | Partly Cloudy | 8 mph W | 10% |
| Monday | 56°F | Chance Light Rain | 8 to 13 mph W | 30% |
| Monday Night | 38°F | Slight Chance Light Rain then Partly Cloudy | 7 to 10 mph W | 24% |
| Tuesday | 57°F | Sunny | 9 to 14 mph W | 7% |
| Tuesday Night | 39°F | Mostly Clear | 10 mph W | 5% |
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 Nov 4, 2026.