National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Andover, Aeroflex-Andover Airport (K12N)

Lat: 41.01°NLon: 74.74°WElev: 584ft.

54°F

12°C

Humidity 67%
Wind Speed Calm
Barometer 29.98 in (1015.4 mb)
Dewpoint 43°F (6°C)
Visibility NA
Last update 22 Apr 4:54 pm EDT
Extended Forecast for

Lake Hopatcong NJ

  • Tonight

    Tonight: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 42. East wind around 5 mph becoming calm.

    Low: 42 °F

    Patchy Fog

  • Thursday

    Thursday: Sunny, with a high near 70. Northwest wind 5 to 10 mph, with gusts as high as 25 mph.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 45. Northwest wind around 5 mph becoming calm in the evening.

    Low: 45 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 62. Calm wind becoming north around 5 mph.

    High: 62 °F

    Partly Sunny

  • Friday Night

    Friday Night: A chance of showers after 2am. Mostly cloudy, with a low around 43. Calm wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 43 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers likely, mainly after 8am. Mostly cloudy, with a high near 47. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 47 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.

    Low: 40 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 2pm. Mostly cloudy, with a high near 58. Chance of precipitation is 30%.

    High: 58 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 42. East wind around 5 mph becoming calm.
Thursday
Sunny, with a high near 70. Northwest wind 5 to 10 mph, with gusts as high as 25 mph.
Thursday Night
Increasing clouds, with a low around 45. Northwest wind around 5 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 62. Calm wind becoming north around 5 mph.
Friday Night
A chance of showers after 2am. Mostly cloudy, with a low around 43. Calm wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Showers likely, mainly after 8am. Mostly cloudy, with a high near 47. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.
Sunday
A chance of showers before 2pm. Mostly cloudy, with a high near 58. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 39.
Monday
Mostly sunny, with a high near 62.
Monday Night
A chance of showers. Mostly cloudy, with a low around 43. Chance of precipitation is 30%.
Tuesday
Showers likely. Mostly cloudy, with a high near 58. Chance of precipitation is 60%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 59. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lake Hopatcong NJ
 40.94°N 74.61°W (Elev. 928 ft)
Last Update:
4:09 pm EDT Apr 22, 2026
Forecast Valid:
5pm EDT Apr 22, 2026-6pm EDT Apr 29, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation