Topsham, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Topsham, a community in Sagadahoc County, Maine.
Tonight
46°F
Chance Rain Showers then Cloudy
A chance of rain showers before midnight. Cloudy, with a low around 46. Southeast wind 0 to 5 mph. Chance of precipitation is 30%.
7-day forecast for Topsham
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Chance Rain Showers then Cloudy | 0 to 5 mph SE | 29% |
| Wednesday | 70°F | Mostly Sunny | 0 to 5 mph SW | 6% |
| Wednesday Night | 51°F | Partly Cloudy | 5 mph SW | 3% |
| Thursday | 68°F | Mostly Cloudy | 5 to 10 mph SW | 13% |
| Thursday Night | 57°F | Mostly Cloudy | 5 to 10 mph SW | 14% |
| Friday | 67°F | Light Rain Likely | 0 to 5 mph S | 63% |
| Friday Night | 51°F | Light Rain | 0 to 5 mph NE | 85% |
| Saturday | 59°F | Light Rain | 10 mph N | 79% |
| Saturday Night | 43°F | Light Rain Likely | 5 mph NW | 57% |
| Sunday | 57°F | Chance Light Rain | 5 to 10 mph NW | 39% |
| Sunday Night | 36°F | Slight Chance Light Rain then Mostly Cloudy | 0 to 5 mph W | 17% |
| Monday | 55°F | Partly Sunny then Slight Chance Light Rain | 5 to 10 mph NW | 20% |
| Monday Night | 33°F | Slight Chance Light Rain | 5 mph NW | 19% |
| Tuesday | 54°F | Slight Chance Light Rain then Mostly Sunny | 5 to 15 mph W | 18% |
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 Nov 4, 2026.