Topsham, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Topsham, a community in Sagadahoc County, Maine.
Overnight
46°F
Mostly Cloudy
Mostly cloudy, with a low around 46. Wind around 0 mph.
7-day forecast for Topsham
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Mostly Cloudy | 0 mph | 3% |
| Wednesday | 70°F | Partly Sunny | 0 to 5 mph SW | 4% |
| Wednesday Night | 51°F | Partly Cloudy | 5 mph SW | 3% |
| Thursday | 67°F | Mostly Cloudy then Chance Light Rain | 5 to 15 mph S | 38% |
| Thursday Night | 56°F | Mostly Cloudy then Slight Chance Light Rain | 0 to 10 mph SW | 17% |
| Friday | 68°F | Light Rain Likely | 0 to 5 mph S | 58% |
| Friday Night | 51°F | Light Rain | 0 to 5 mph E | 92% |
| Saturday | 59°F | Light Rain | 5 to 10 mph NE | 83% |
| Saturday Night | 43°F | Chance Light Rain | 5 to 10 mph N | 43% |
| Sunday | 54°F | Chance Light Rain | 5 to 10 mph NW | 38% |
| Sunday Night | 35°F | Slight Chance Light Rain then Partly Cloudy | 0 to 5 mph W | 16% |
| Monday | 52°F | Mostly Sunny then Slight Chance Light Rain | 5 to 10 mph W | 21% |
| Monday Night | 32°F | Slight Chance Light Rain then Partly Cloudy | 5 mph W | 19% |
| Tuesday | 54°F | Mostly Sunny | 5 to 10 mph SW | 11% |
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.