Lake Hopatcong, NJ Weather & Growing Conditions
Overnight
49°F
Mostly Clear
Mostly clear, with a low around 49. Southwest wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Mostly Clear | 0 mph | 1% |
| Wednesday | 71°F | Sunny | 0 to 5 mph SW | 1% |
| Wednesday Night | 56°F | Mostly Cloudy then Patchy Fog | 0 to 5 mph S | 2% |
| Thursday | 68°F | Light Rain Likely | 5 mph S | 64% |
| Thursday Night | 58°F | Light Rain | 0 to 5 mph SW | 75% |
| Friday | 68°F | Light Rain Likely | 0 mph | 70% |
| Friday Night | 49°F | Light Rain Likely | 0 mph | 70% |
| Saturday | 62°F | Mostly Sunny then Slight Chance Light Rain | 0 to 5 mph NW | 23% |
| Saturday Night | 42°F | Slight Chance Light Rain | 0 to 5 mph W | 23% |
| Sunday | 56°F | Mostly Sunny | 0 to 5 mph NW | 9% |
| Sunday Night | 38°F | Partly Cloudy | 0 to 5 mph W | 5% |
| Monday | 56°F | Sunny | 5 to 10 mph W | 10% |
| Monday Night | 36°F | Mostly Clear | 0 to 5 mph W | 7% |
| Tuesday | 59°F | Sunny | 5 to 10 mph W | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lake Hopatcong, NJ
Last spring frost
Apr 25
First fall frost
Oct 19
Growing season
175 days
Hardiness zone
6b
Explore more for Lake Hopatcong, NJ: full frost dates · planting calendar · New Jersey frost dates
Climate data from the nearest NOAA station, Andover Aeroflex Ap, Nj (7.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.