Topsham, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Topsham, a community in Sagadahoc County, Maine.
Overnight
45°F
Mostly Clear
Mostly clear, with a low around 45. North wind around 5 mph.
7-day forecast for Topsham
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 45°F | Mostly Clear | 5 mph N | 0% |
| Saturday | 66°F | Sunny | 5 mph NW | 0% |
| Saturday Night | 43°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Sunday | 62°F | Mostly Cloudy then Rain | 0 to 10 mph SE | 76% |
| Sunday Night | 43°F | Rain Likely then Rain Showers Likely | 0 to 5 mph NE | 70% |
| Monday | 66°F | Mostly Sunny | 10 mph N | 4% |
| Monday Night | 42°F | Partly Cloudy | 5 to 10 mph N | 0% |
| Tuesday | 64°F | Mostly Sunny | 5 to 10 mph NE | 0% |
| Tuesday Night | 42°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Wednesday | 65°F | Mostly Sunny | 5 to 10 mph E | 0% |
| Wednesday Night | 41°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 64°F | Slight Chance Rain Showers | 5 to 10 mph NE | 22% |
| Thursday Night | 43°F | Chance Rain Showers | 5 to 15 mph NE | 32% |
| Friday | 65°F | Chance Rain Showers | 15 mph N | 32% |
Forecast source: National Weather Service (api.weather.gov) for Topsham (43.947, -69.932). Updated through the day.
Growing snapshot for Topsham
Last spring frost
May 2
First fall frost
Oct 10
Growing season
160 days
Hardiness zone
5b
More local growing data for Topsham: nearby ZIP 04086 weather · frost dates · planting calendar · Maine frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Brunswick Nas, Me (4.6 mi from Topsham). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.