Newcastle, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newcastle, a community in Lincoln County, Maine.
Overnight
47°F
Mostly Cloudy
Mostly cloudy, with a low around 47. Wind around 0 mph.
7-day forecast for Newcastle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Mostly Cloudy | 0 mph | 4% |
| Wednesday | 71°F | Partly Sunny | 0 to 5 mph SW | 4% |
| Wednesday Night | 51°F | Partly Cloudy | 0 to 5 mph SW | 3% |
| Thursday | 68°F | Mostly Cloudy then Chance Light Rain | 5 to 15 mph SW | 32% |
| Thursday Night | 57°F | Slight Chance Light Rain | 0 to 10 mph SW | 19% |
| Friday | 69°F | Light Rain Likely | 0 to 5 mph S | 59% |
| Friday Night | 51°F | Light Rain | 0 to 5 mph E | 94% |
| Saturday | 61°F | Light Rain | 5 to 10 mph E | 85% |
| Saturday Night | 43°F | Chance Light Rain | 0 to 5 mph N | 53% |
| Sunday | 55°F | Chance Light Rain | 5 to 10 mph NW | 45% |
| 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 | 23% |
| Monday Night | 32°F | Slight Chance Light Rain then Partly Cloudy | 5 mph W | 21% |
| Tuesday | 54°F | Mostly Sunny | 5 to 10 mph W | 11% |
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 Nov 4, 2026.