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

Briefing for Impacts from Hurricane Erin through Friday

Hurricane Erin is expected to bring several coastal and marine hazards to the coasts of New Jersey and Delaware through Friday. Widespread coastal flooding, high surf, 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

Philadelphia, Northeast Philadelphia Airport (KPNE)

Lat: 40.08°NLon: 75.01°WElev: 118ft.

Overcast

62°F

17°C

Humidity 93%
Wind Speed NE 13 mph
Barometer 29.95 in (1014.2 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 21 Aug 4:54 am EDT
Extended Forecast for

Cornwells PA

Coastal Flood Advisory August 21, 11:00pm until August 23, 05:00am
Click here for hazard details and duration
Coastal Flood Advisory

  • Overnight

    Overnight: A slight chance of showers. Cloudy, with a low around 61. Northeast wind around 15 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Cloudy, with a high near 73. Northeast wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 73 °F

    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming clear, with a low around 59. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 82. North wind 5 to 10 mph.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 61. Calm wind.

    Low: 61 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Sunday

    Sunday: A chance of showers after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 40%.

    High: 83 °F

    Partly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly after 8pm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.

    Low: 68 °F

    Showers
    Likely

Detailed Forecast

Overnight
A slight chance of showers. Cloudy, with a low around 61. Northeast wind around 15 mph. Chance of precipitation is 20%.
Thursday
Cloudy, with a high near 73. Northeast wind 10 to 15 mph, with gusts as high as 30 mph.
Thursday Night
Mostly cloudy, then gradually becoming clear, with a low around 59. North wind around 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 82. North wind 5 to 10 mph.
Friday Night
Clear, with a low around 61. Calm wind.
Saturday
Sunny, with a high near 84.
Saturday Night
Mostly clear, with a low around 65.
Sunday
A chance of showers after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 40%.
Sunday Night
Showers likely, mainly after 8pm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
Monday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 50%.
Monday Night
A chance of thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
Tuesday
Sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 58.
Wednesday
Sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cornwells PA
 40.09°N 74.96°W (Elev. 72 ft)
Last Update:
4:11 am EDT Aug 21, 2025
Forecast Valid:
5am EDT Aug 21, 2025-6pm EDT Aug 27, 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