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.

81°F

27°C

Humidity 57%
Wind Speed Vrbl 5 mph
Barometer 30.17 in (1021.0 mb)
Dewpoint 64°F (18°C)
Visibility NA
Heat Index83°F (28°C)
Last update 18 May 9:54 am EDT
Extended Forecast for

Hopatcong NJ

  • Today

    Today: Sunny, with a high near 90. Southwest wind 5 to 10 mph.

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 68. Southwest wind around 5 mph.

    Low: 68 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 92. West wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 92 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 72. Southwest wind around 5 mph.

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm after 2pm. High near 89. West wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Sunny then
    Showers

  • Wednesday Night

    Wednesday Night: Showers before 8pm. Low around 50. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers after 2pm. Partly sunny, with a high near 64. Chance of precipitation is 30%.

    High: 64 °F

    Partly Sunny
    then Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 90. Southwest wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 68. Southwest wind around 5 mph.
Tuesday
Mostly sunny, with a high near 92. West wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 72. Southwest wind around 5 mph.
Wednesday
Showers and possibly a thunderstorm after 2pm. High near 89. West wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers before 8pm. Low around 50. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Partly sunny, with a high near 67.
Thursday Night
Partly cloudy, with a low around 48.
Friday
A chance of showers after 2pm. Partly sunny, with a high near 64. Chance of precipitation is 30%.
Friday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 48. Chance of precipitation is 70%.
Saturday
Showers likely. Mostly cloudy, with a high near 64. Chance of precipitation is 70%.
Saturday Night
Showers likely. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.
Sunday
Showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hopatcong NJ
 40.95°N 74.67°W (Elev. 1096 ft)
Last Update:
4:09 am EDT May 18, 2026
Forecast Valid:
10am EDT May 18, 2026-6pm EDT May 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