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.

60°F

16°C

Humidity 84%
Wind Speed Calm
Barometer 29.98 in (1014.4 mb)
Dewpoint 55°F (13°C)
Visibility NA
Last update 17 May 3:54 am EDT
Extended Forecast for

Hopatcong NJ

  • Overnight

    Overnight: A chance of sprinkles before 5am. Mostly clear, with a low around 59. West wind around 5 mph.

    Low: 59 °F

    Chance
    Sprinkles

  • Sunday

    Sunday: Sunny, with a high near 86. West wind 5 to 10 mph.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 63. Southwest wind around 5 mph becoming calm.

    Low: 63 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 89. Calm wind becoming south around 5 mph in the afternoon.

    High: 89 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 67. Calm wind becoming southwest around 5 mph.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 70%.

    High: 87 °F

    Sunny then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.

    Low: 52 °F

    Showers
    Likely then
    Mostly Cloudy

Detailed Forecast

Overnight
A chance of sprinkles before 5am. Mostly clear, with a low around 59. West wind around 5 mph.
Sunday
Sunny, with a high near 86. West wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 63. Southwest wind around 5 mph becoming calm.
Monday
Partly sunny, then gradually becoming sunny, with a high near 89. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 67. Calm wind becoming southwest around 5 mph.
Tuesday
Sunny, with a high near 92.
Tuesday Night
Partly cloudy, with a low around 70.
Wednesday
Showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
Partly cloudy, with a low around 49.
Friday
A chance of showers. Partly sunny, with a high near 66. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 49.
Saturday
A chance of showers. Mostly cloudy, with a high near 66. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hopatcong NJ
 40.94°N 74.64°W (Elev. 971 ft)
Last Update:
4:08 am EDT May 17, 2026
Forecast Valid:
4am EDT May 17, 2026-6pm EDT May 23, 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