Boothbay Harbor, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Boothbay Harbor, a community in Lincoln County, Maine.
Today
83°F
Sunny
Sunny, with a high near 83. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
7-day forecast for Boothbay Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Sunny | 5 to 15 mph SW | 0% |
| Tonight | 62°F | Mostly Clear | 5 to 10 mph SW | 0% |
| Wednesday | 82°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 64°F | Partly Cloudy | 0 to 5 mph SW | 4% |
| Thursday | 85°F | Mostly Sunny | 0 to 5 mph SW | 4% |
| Thursday Night | 67°F | Partly Cloudy | 0 to 5 mph SW | 5% |
| Friday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph SW | 15% |
| Friday Night | 68°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 21% |
| Saturday | 82°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 32% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SW | 29% |
| Sunday | 82°F | Mostly Sunny | 0 to 10 mph SW | 6% |
| Sunday Night | 67°F | Mostly Clear | 0 to 10 mph SW | 7% |
| Monday | 84°F | Sunny | 5 to 10 mph SW | 10% |
| Monday Night | 66°F | Slight Chance Rain Showers | 5 to 10 mph W | 17% |
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 Aug 4, 2026.