Lake Hopatcong, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Hopatcong, a community in Morris County, New Jersey.
Today
82°F
Mostly Sunny
Mostly sunny, with a high near 82. Northeast wind around 0 mph.
7-day forecast for Lake Hopatcong
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 63°F | Mostly Cloudy | 0 mph | 1% |
| Wednesday | 80°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 33% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 0 mph | 52% |
| Thursday | 85°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 66% |
| Thursday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 66% |
| Friday | 85°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 50% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 0 mph | 50% |
| Saturday | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 51% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 51% |
| Sunday | 84°F | Mostly Sunny | 0 to 5 mph W | 11% |
| Sunday Night | 69°F | Mostly Clear | 0 mph | 11% |
| Monday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 16% |
| Monday Night | 67°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph W | 16% |
Forecast source: National Weather Service (api.weather.gov) for Lake Hopatcong (40.960, -74.610). Updated through the day.
Growing snapshot for Lake Hopatcong
Last spring frost
Apr 25
First fall frost
Oct 19
Growing season
175 days
Hardiness zone
6b
More local growing data for Lake Hopatcong: nearby ZIP 07849 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Beattystown
Boonton
Brookside
Budd Lake
Cedar Knolls
Chester
Dover
Flanders
Florham Park
Gillette
Green Village
Hibernia
Kenvil
Kinnelon
Lake Hiawatha
Lake Telemark
Landing
Ledgewood
Lincoln Park
Long Valley
Lower Berkshire Valley
Macopin
Madison
Mendham
Millington
Morris Plains
Morristown
Mount Arlington
Mount Hope
Mount Tabor
Climate data from the nearest NOAA station, Andover Aeroflex Ap, Nj (7.2 mi from Lake Hopatcong). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.