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.

32°F

0°C

Humidity 82%
Wind Speed Calm
Barometer 30.59 in (1036.8 mb)
Dewpoint 27°F (-3°C)
Visibility NA
Last update 9 Apr 7:54 am EDT
Extended Forecast for

Lake Hopatcong NJ

  • Today

    Today: Mostly sunny, with a high near 54. Calm wind becoming south around 5 mph in the afternoon.

    High: 54 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 34. South wind around 5 mph becoming calm in the evening.

    Low: 34 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 66. Light southwest wind increasing to 5 to 10 mph in the afternoon.

    High: 66 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: A slight chance of showers before 2am. Mostly cloudy, with a low around 43. Southwest wind around 5 mph becoming west after midnight. Chance of precipitation is 20%.

    Low: 43 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 58. Northwest wind around 10 mph, with gusts as high as 25 mph.

    High: 58 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 72.

    High: 72 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly sunny, with a high near 54. Calm wind becoming south around 5 mph in the afternoon.
Tonight
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 34. South wind around 5 mph becoming calm in the evening.
Friday
Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 66. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Friday Night
A slight chance of showers before 2am. Mostly cloudy, with a low around 43. Southwest wind around 5 mph becoming west after midnight. Chance of precipitation is 20%.
Saturday
Sunny, with a high near 58. Northwest wind around 10 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Mostly sunny, with a high near 60.
Sunday Night
Mostly cloudy, with a low around 46.
Monday
Mostly cloudy, with a high near 72.
Monday Night
Mostly cloudy, with a low around 57.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
Mostly cloudy, with a low around 61.
Wednesday
Partly sunny, with a high near 81.
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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:
4:24 am EDT Apr 9, 2026
Forecast Valid:
8am EDT Apr 9, 2026-6pm EDT Apr 15, 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