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

Hazardous Weather Conditions

Current conditions at

Andover, Aeroflex-Andover Airport (K12N)

Lat: 41.01°NLon: 74.74°WElev: 584ft.

32°F

0°C

Humidity 96%
Wind Speed Calm
Barometer 29.94 in (1014.8 mb)
Dewpoint 31°F (-1°C)
Visibility NA
Last update 18 Feb 5:54 am EST
Extended Forecast for

Lake Hopatcong NJ

Dense Fog Advisory February 18, 06:42am until February 18, 10:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory February 18, 06:42am until February 18, 10:00am

    NOW until 10:00am Wed

    Dense Fog Advisory

  • Today

    High: 41 °F

    Rain and
    Dense Fog

  • Tonight

    Tonight: Rain, mainly before 10pm. Patchy fog after 7pm. Low around 31. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 31 °F

    Rain and
    Patchy Fog
    then Patchy
    Fog

  • Thursday

    Thursday: A slight chance of rain after 1pm, mixing with snow after 4pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 37. Calm wind becoming east around 5 mph. Chance of precipitation is 20%.

    High: 37 °F

    Patchy Fog
    then Slight
    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A chance of snow before 10pm, then rain likely, possibly mixed with snow. Cloudy, with a low around 31. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 31 °F

    Chance
    Rain/Snow
    then
    Rain/Snow
    Likely

  • Friday

    Friday: Rain. High near 37. East wind around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 37 °F

    Rain

  • Friday Night

    Friday Night: A chance of rain before 4am, then a slight chance of rain and snow. Mostly cloudy, with a low around 31. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 31 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Saturday

    Saturday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of snow after 1am. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.

    Low: 28 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Today
Rain, mainly after 10am. Widespread dense fog before 3pm, then patchy dense fog after 5pm. High near 41. Calm wind. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Rain, mainly before 10pm. Patchy fog after 7pm. Low around 31. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A slight chance of rain after 1pm, mixing with snow after 4pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 37. Calm wind becoming east around 5 mph. Chance of precipitation is 20%.
Thursday Night
A chance of snow before 10pm, then rain likely, possibly mixed with snow. Cloudy, with a low around 31. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 70%. Little or no snow accumulation expected.
Friday
Rain. High near 37. East wind around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A chance of rain before 4am, then a slight chance of rain and snow. Mostly cloudy, with a low around 31. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Partly sunny, with a high near 43.
Saturday Night
A chance of snow after 1am. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.
Sunday
Snow likely, mainly after 1pm. Mostly cloudy, with a high near 33. Chance of precipitation is 60%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 25. Chance of precipitation is 50%.
Monday
A chance of snow. Mostly cloudy, with a high near 34. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 17.
Tuesday
Mostly sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Hopatcong NJ
 40.94°N 74.61°W (Elev. 928 ft)
Last Update:
4:13 am EST Feb 18, 2026
Forecast Valid:
6am EST Feb 18, 2026-6pm EST Feb 24, 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