Boothbay Harbor, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Boothbay Harbor, a community in Lincoln County, Maine.
Overnight
48°F
Mostly Cloudy
Mostly cloudy, with a low around 48. West wind around 0 mph.
7-day forecast for Boothbay Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Mostly Cloudy | 0 mph | 5% |
| Wednesday | 66°F | Partly Sunny | 0 to 10 mph SW | 4% |
| Wednesday Night | 52°F | Partly Cloudy | 5 to 10 mph SW | 3% |
| Thursday | 65°F | Mostly Cloudy then Chance Light Rain | 10 to 15 mph SW | 35% |
| Thursday Night | 55°F | Slight Chance Light Rain | 5 to 15 mph SW | 21% |
| Friday | 66°F | Light Rain Likely | 0 to 5 mph S | 67% |
| Friday Night | 51°F | Light Rain | 0 to 5 mph SE | 94% |
| Saturday | 59°F | Light Rain | 5 to 10 mph SE | 86% |
| Saturday Night | 44°F | Chance Light Rain | 5 to 10 mph N | 44% |
| Sunday | 54°F | Chance Light Rain | 5 to 10 mph NW | 39% |
| Sunday Night | 39°F | Slight Chance Light Rain then Partly Cloudy | 0 to 5 mph W | 16% |
| Monday | 53°F | Chance Light Rain | 5 to 15 mph W | 26% |
| Monday Night | 36°F | Slight Chance Light Rain then Partly Cloudy | 5 to 10 mph W | 22% |
| Tuesday | 53°F | Mostly Sunny | 10 to 15 mph W | 11% |
Forecast source: National Weather Service (api.weather.gov) for Boothbay Harbor (43.856, -69.623). Updated through the day.
Growing snapshot for Boothbay Harbor
Last spring frost
Apr 28
First fall frost
Oct 21
Growing season
175 days
Hardiness zone
6a
More local growing data for Boothbay Harbor: nearby ZIP 04538 weather · frost dates · planting calendar · Maine frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Westport Island, Me (4.8 mi from Boothbay Harbor). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.