Newcastle, ME Weather & Growing Conditions
Today
71°F
Mostly Sunny
Mostly sunny. High near 71, with temperatures falling to around 62 in the afternoon. Southwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Mostly Sunny | 5 mph SW | 4% |
| Tonight | 51°F | Partly Cloudy | 0 to 5 mph S | 3% |
| Thursday | 68°F | Mostly Cloudy then Chance Light Rain | 5 to 15 mph SW | 30% |
| Thursday Night | 57°F | Slight Chance Light Rain | 0 to 10 mph SW | 20% |
| Friday | 69°F | Light Rain Likely | 0 to 5 mph S | 57% |
| Friday Night | 51°F | Light Rain | 0 to 5 mph E | 93% |
| Saturday | 60°F | Light Rain | 5 to 10 mph E | 86% |
| Saturday Night | 43°F | Chance Light Rain | 0 to 5 mph N | 54% |
| Sunday | 55°F | Chance Light Rain | 5 to 10 mph NW | 46% |
| Sunday Night | 34°F | Slight Chance Light Rain then Partly Cloudy | 0 to 5 mph W | 17% |
| Monday | 53°F | Mostly Sunny then Slight Chance Light Rain | 5 to 10 mph W | 22% |
| Monday Night | 32°F | Slight Chance Light Rain then Partly Cloudy | 5 mph W | 20% |
| Tuesday | 54°F | Mostly Sunny | 5 to 10 mph SW | 11% |
| Tuesday Night | 30°F | Partly Cloudy | 5 mph W | 10% |
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 (4.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.