Newcastle, ME Weather & Growing Conditions
Today
86°F
Sunny
Sunny, with a high near 86. West wind around 10 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 10 mph W | 0% |
| Tonight | 60°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Wednesday | 86°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 64°F | Partly Cloudy | 0 to 5 mph SW | 4% |
| Thursday | 88°F | Sunny | 0 to 5 mph SW | 4% |
| Thursday Night | 69°F | Partly Cloudy | 0 to 5 mph W | 4% |
| Friday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 22% |
| Friday Night | 69°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 22% |
| Saturday | 87°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 37% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph W | 33% |
| Sunday | 88°F | Mostly Sunny | 0 to 10 mph SW | 7% |
| Sunday Night | 68°F | Mostly Clear | 0 to 5 mph SW | 6% |
| Monday | 89°F | Sunny | 0 to 10 mph SW | 12% |
| Monday Night | 66°F | Slight Chance Rain Showers | 0 to 10 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Newcastle, ME
Last spring frost
Apr 27
First fall frost
Oct 18
Growing season
172 days
Hardiness zone
5b
Explore more for Newcastle, ME: full frost dates · planting calendar · Maine frost dates
Climate data from the nearest NOAA station, Newcastle, Me (1.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.