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
49°F
Partly Cloudy
Partly cloudy, with a low around 49. South wind 0 to 5 mph.
7-day forecast for Boothbay Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Sunday | 60°F | Mostly Cloudy then Light Rain Likely | 5 to 10 mph S | 70% |
| Sunday Night | 48°F | Rain | 0 to 5 mph NE | 75% |
| Monday | 67°F | Sunny | 5 to 10 mph N | 4% |
| Monday Night | 46°F | Partly Cloudy | 5 mph N | 0% |
| Tuesday | 64°F | Mostly Sunny | 5 to 10 mph NE | 0% |
| Tuesday Night | 47°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Wednesday | 63°F | Sunny | 5 to 10 mph NE | 0% |
| Wednesday Night | 46°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Thursday | 63°F | Mostly Sunny then Slight Chance Rain Showers | 5 to 10 mph NE | 15% |
| Thursday Night | 47°F | Slight Chance Rain Showers | 0 to 10 mph NE | 22% |
| Friday | 64°F | Chance Rain Showers | 10 to 20 mph NE | 36% |
| Friday Night | 49°F | Chance Rain Showers | 15 to 20 mph NE | 42% |
| Saturday | 64°F | Chance Rain Showers | 20 to 25 mph N | 41% |
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 Sep 20, 2026.