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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, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Overcast

64°F

18°C

Humidity 90%
Wind Speed NE 18 G 26 mph
Barometer 29.94 in (1013.9 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 21 Aug 10:54 am EDT
Extended Forecast for

Mount Royal NJ

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

  • Today

    Today: Mostly cloudy, with a high near 73. Northeast wind around 15 mph, with gusts as high as 30 mph.

    High: 73 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around 59. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Gradual
    Clearing

  • 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 59. Calm wind.

    Low: 59 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 83. Light southwest wind becoming south 5 to 10 mph in the afternoon.

    High: 83 °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 82. Chance of precipitation is 40%.

    High: 82 °F

    Partly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 70%.

    Low: 67 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 40%.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Mostly cloudy, with a high near 73. Northeast wind around 15 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy during the early evening, then gradual clearing, 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 59. Calm wind.
Saturday
Sunny, with a high near 83. Light southwest wind becoming south 5 to 10 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 65.
Sunday
A chance of showers after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 40%.
Sunday Night
Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 67. 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 40%.
Monday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 61. Chance of precipitation is 30%.
Tuesday
Sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Royal NJ
 39.81°N 75.21°W (Elev. 62 ft)
Last Update:
4:11 am EDT Aug 21, 2025
Forecast Valid:
11am 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