South Dennis, MA Weather & Growing Conditions
This Afternoon
64°F
Mostly Sunny
Mostly sunny, with a high near 64. Northeast wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Mostly Sunny | 7 mph NE | 0% |
| Tonight | 48°F | Partly Cloudy | 5 mph E | 0% |
| Sunday | 64°F | Mostly Cloudy then Rain Showers | 3 to 10 mph SE | 98% |
| Sunday Night | 60°F | Rain Showers | 5 to 9 mph E | 97% |
| Monday | 67°F | Chance Rain Showers then Mostly Cloudy | 8 to 16 mph NE | 51% |
| Monday Night | 55°F | Mostly Cloudy | 8 to 12 mph NE | 2% |
| Tuesday | 66°F | Partly Sunny | 14 mph NE | 4% |
| Tuesday Night | 55°F | Mostly Cloudy | 12 to 15 mph NE | 3% |
| Wednesday | 66°F | Partly Sunny | 15 to 18 mph NE | 4% |
| Wednesday Night | 55°F | Mostly Cloudy then Slight Chance Rain Showers | 15 to 18 mph NE | 17% |
| Thursday | 66°F | Chance Rain Showers | 21 mph NE | 31% |
| Thursday Night | 55°F | Chance Rain Showers | 22 mph NE | 41% |
| Friday | 67°F | Chance Rain Showers | 23 mph NE | 46% |
| Friday Night | 55°F | Chance Rain Showers | 23 mph NE | 45% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for South Dennis, MA
Last spring frost
Apr 13
First fall frost
Nov 3
Growing season
204 days
Hardiness zone
7a
Explore more for South Dennis, MA: full frost dates · planting calendar · Massachusetts frost dates
Climate data from the nearest NOAA station, W Harwich, Ma (3.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.