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

Briefing for Impacts from Hurricane Erin through Sunday

Hurricane Erin will continue to bring coastal and marine hazards to the coasts of New Jersey and Delaware through the weekend. Coastal flooding, high risk of rip currents, beach erosion, and dangerous marine conditions are forecast. View this briefing for details on these threats. Read More >

Hazardous Weather Conditions

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fair

72°F

22°C

Humidity 48%
Wind Speed Vrbl 6 mph
Barometer 30.03 in (1016.3 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 22 Aug 7:53 pm EDT
Extended Forecast for

Newtown PA

Coastal Flood Advisory August 22, 08:41pm until August 24, 06:00am
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory August 22, 08:41pm until August 24, 06:00am

    NOW until 6:00am Sun

    Coastal Flood Advisory

  • Tonight

    Low: 60 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 84. Light southwest wind becoming south 5 to 10 mph in the morning.

    High: 84 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 64. South wind around 5 mph.

    Low: 64 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers after 2pm. Partly sunny, with a high near 85. South wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 85 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 67. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

Tonight
Clear, with a low around 60. Calm wind becoming southwest around 5 mph.
Saturday
Sunny, with a high near 84. Light southwest wind becoming south 5 to 10 mph in the morning.
Saturday Night
Mostly clear, with a low around 64. South wind around 5 mph.
Sunday
A slight chance of showers after 2pm. Partly sunny, with a high near 85. South wind 5 to 10 mph. Chance of precipitation is 20%.
Sunday Night
A chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 67. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 55.
Thursday
Sunny, with a high near 79.
Thursday Night
Partly cloudy, with a low around 57.
Friday
Mostly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newtown PA
 40.22°N 74.93°W (Elev. 164 ft)
Last Update:
4:10 pm EDT Aug 22, 2025
Forecast Valid:
8pm EDT Aug 22, 2025-6pm EDT Aug 29, 2025
 
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