Newcastle, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newcastle, a community in Lincoln County, Maine.
This Afternoon
78°F
Sunny
Sunny, with a high near 78. Northwest wind around 10 mph, with gusts as high as 25 mph.
7-day forecast for Newcastle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Sunny | 10 mph NW | 0% |
| Tonight | 44°F | Mostly Clear | 5 to 10 mph NW | 0% |
| Saturday | 66°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 44°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 65°F | Chance Rain Showers | 0 to 10 mph S | 33% |
| Sunday Night | 46°F | Chance Rain Showers | 0 to 5 mph W | 50% |
| Monday | 68°F | Mostly Sunny | 5 to 10 mph N | 7% |
| Monday Night | 43°F | Partly Cloudy | 5 mph N | 0% |
| Tuesday | 65°F | Mostly Sunny | 5 to 10 mph NE | 0% |
| Tuesday Night | 43°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Wednesday | 65°F | Mostly Sunny | 5 to 10 mph NE | 1% |
| Wednesday Night | 43°F | Partly Cloudy | 0 to 5 mph NE | 5% |
| Thursday | 65°F | Partly Sunny then Slight Chance Rain Showers | 0 to 10 mph NE | 22% |
| Thursday Night | 45°F | Chance Rain Showers | 0 to 5 mph NE | 26% |
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 Sep 18, 2026.