Dangerous Surf and Rip Currents for most of the Atlantic Shoreline; Record Heat for the West

Hurricane Erin continues to track northward. Tropical storm force winds, storm surge conditions will increase for the Outer Banks today and portions of coastal Virginia. Life-threatening surf and rip currents along much of the east coast of the U.S. this week. Major to extreme HeatRisk with new record high temperatures are expected for many areas of the western U.S. this week. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Clear

54°F

12°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 20 Aug 05:35 AM PDT
Extended Forecast for

3 Miles N Hercules CA

Heat Advisory August 21, 10:00am until August 22, 10:00pm
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: Sunny, with a high near 83. West southwest wind 6 to 13 mph.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. South southwest wind 9 to 13 mph.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. Southwest wind 7 to 11 mph.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58. Southwest wind around 10 mph.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 80. Southwest wind 11 to 14 mph, with gusts as high as 18 mph.

    High: 80 °F

    Mostly Sunny

  • Friday Night

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

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 83. West southwest wind 6 to 13 mph.
Tonight
Mostly clear, with a low around 59. South southwest wind 9 to 13 mph.
Thursday
Sunny, with a high near 84. Southwest wind 7 to 11 mph.
Thursday Night
Partly cloudy, with a low around 58. Southwest wind around 10 mph.
Friday
Mostly sunny, with a high near 80. Southwest wind 11 to 14 mph, with gusts as high as 18 mph.
Friday Night
Mostly clear, with a low around 59.
Saturday
Sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
Mostly sunny, with a high near 76.
Sunday Night
Mostly clear, with a low around 58.
Monday
Mostly sunny, with a high near 74.
Monday Night
Mostly clear, with a low around 58.
Tuesday
Sunny, with a high near 73.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Hercules CA
 38.05°N 122.25°W (Elev. 56 ft)
1:49 am PDT Aug 20, 2025
5am PDT Aug 20, 2025-6pm PDT Aug 26, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database