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 93%
Wind Speed S 7 mph
Barometer 30.20 in (1023.5 mb)
Dewpoint 36°F (2°C)
Visibility NA
Wind Chill33°F (1°C)
Last update 7 Mar 9:54 am EST
Extended Forecast for

Lake Hopatcong NJ

  • Today

    Today: Areas of dense fog before noon. Otherwise, mostly cloudy, with a high near 46. South wind around 5 mph.

    High: 46 °F

    Areas Dense
    Fog then
    Mostly Cloudy

  • Tonight

    Tonight: Showers likely, mainly between 9pm and 2am. Cloudy, with a temperature rising to around 54 by 4am. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F⇑

    Showers
    Likely

  • Sunday

    Sunday: A slight chance of showers between 7am and 1pm. Mostly cloudy, with a high near 62. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 62 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. West wind around 5 mph becoming calm after midnight.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 65. Light west wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers. Cloudy, with a high near 69. Chance of precipitation is 50%.

    High: 69 °F

    Chance
    Showers

Detailed Forecast

Today
Areas of dense fog before noon. Otherwise, mostly cloudy, with a high near 46. South wind around 5 mph.
Tonight
Showers likely, mainly between 9pm and 2am. Cloudy, with a temperature rising to around 54 by 4am. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A slight chance of showers between 7am and 1pm. Mostly cloudy, with a high near 62. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 39. West wind around 5 mph becoming calm after midnight.
Monday
Sunny, with a high near 65. Light west wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Mostly sunny, with a high near 70.
Tuesday Night
Mostly cloudy, with a low around 49.
Wednesday
A chance of showers. Cloudy, with a high near 69. Chance of precipitation is 50%.
Wednesday Night
Showers likely. Cloudy, with a low around 46. Chance of precipitation is 70%.
Thursday
A chance of showers. Cloudy, with a high near 56. Breezy. Chance of precipitation is 50%.
Thursday Night
Mostly cloudy, with a low around 26.
Friday
Mostly cloudy, with a high near 44.
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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:
4:09 am EST Mar 7, 2026
Forecast Valid:
10am EST Mar 7, 2026-6pm EDT Mar 13, 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