Newcastle, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newcastle, a community in Lincoln County, Maine.
Today
87°F
Sunny
Sunny, with a high near 87. West wind 10 to 15 mph.
7-day forecast for Newcastle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 10 to 15 mph W | 0% |
| Tonight | 60°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Wednesday | 87°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 64°F | Partly Cloudy | 0 to 5 mph SW | 4% |
| Thursday | 89°F | Sunny | 0 to 5 mph SW | 4% |
| Thursday Night | 69°F | Partly Cloudy | 0 to 5 mph W | 3% |
| Friday | 92°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 W | 22% |
| Saturday | 88°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 36% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph W | 32% |
| 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 5 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov) for Newcastle (44.049, -69.533). Updated through the day.
Growing snapshot for Newcastle
Last spring frost
Apr 27
First fall frost
Oct 18
Growing season
172 days
Hardiness zone
5b
More local growing data for Newcastle: nearby ZIP 04553 weather · frost dates · planting calendar · Maine frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Newcastle, Me (1.6 mi from Newcastle). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.