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.

38°F

3°C

Humidity 55%
Wind Speed Vrbl 6 mph
Barometer 30.19 in (1023.3 mb)
Dewpoint 23°F (-5°C)
Visibility NA
Wind Chill33°F (1°C)
Last update 19 Mar 2:54 pm EDT
Extended Forecast for

Lake Hopatcong NJ

  • Tonight

    Tonight: Partly cloudy, with a low around 30. Southwest wind around 5 mph becoming calm.

    Low: 30 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers, mainly after 4pm. Partly sunny, with a high near 56. Light and variable wind becoming south 10 to 15 mph in the morning. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 56 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly between 7pm and 2am. Mostly cloudy, with a low around 39. Southwest wind 5 to 15 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 39 °F

    Showers
    Likely

  • Saturday

    Saturday: Mostly sunny, with a high near 58. Northwest wind around 5 mph.

    High: 58 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of showers after 2pm. Partly sunny, with a high near 62. Chance of precipitation is 20%.

    High: 62 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely after 8pm. Mostly cloudy, with a low around 39. Chance of precipitation is 70%.

    Low: 39 °F

    Showers
    Likely

  • Monday

    Monday: Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 30. Southwest wind around 5 mph becoming calm.
Friday
A chance of showers, mainly after 4pm. Partly sunny, with a high near 56. Light and variable wind becoming south 10 to 15 mph in the morning. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Showers likely, mainly between 7pm and 2am. Mostly cloudy, with a low around 39. Southwest wind 5 to 15 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Mostly sunny, with a high near 58. Northwest wind around 5 mph.
Saturday Night
Mostly cloudy, with a low around 38. Calm wind.
Sunday
A slight chance of showers after 2pm. Partly sunny, with a high near 62. Chance of precipitation is 20%.
Sunday Night
Showers likely after 8pm. Mostly cloudy, with a low around 39. Chance of precipitation is 70%.
Monday
Partly sunny, with a high near 51.
Monday Night
Mostly clear, with a low around 25.
Tuesday
Mostly sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Partly sunny, with a high near 47.
Wednesday Night
Mostly cloudy, with a low around 29.
Thursday
Partly sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Hopatcong NJ
 40.96°N 74.61°W (Elev. 984 ft)
Last Update:
3:05 pm EDT Mar 19, 2026
Forecast Valid:
3pm EDT Mar 19, 2026-6pm EDT Mar 26, 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