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

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

66°F

19°C

Humidity 50%
Wind Speed S 17 MPH
Barometer 29.57 in (1001.36 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 11 Oct 02:54 PM PDT
Extended Forecast for

4 Miles E Saint Helena CA

Coastal Flood Advisory October 11, 03:01pm until October 14, 04:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory October 11, 03:01pm until October 14, 04:00pm

    NOW until 4:00pm Wed

    Coastal Flood Advisory

  • Tonight

    Low: 43 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 70. Calm wind becoming north northeast around 5 mph.

    High: 70 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 74. Calm wind becoming north around 6 mph in the morning.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45. Light and variable wind.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 43. Calm wind.
Columbus Day
Sunny, with a high near 70. Calm wind becoming north northeast around 5 mph.
Monday Night
Mostly clear, with a low around 44. Calm wind.
Tuesday
Sunny, with a high near 74. Calm wind becoming north around 6 mph in the morning.
Tuesday Night
Mostly clear, with a low around 45. Light and variable wind.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Sunny, with a high near 88.
Thursday Night
Clear, with a low around 52.
Friday
Sunny, with a high near 90.
Friday Night
Clear, with a low around 52.
Saturday
Sunny, with a high near 89.
Saturday Night
Mostly clear, with a low around 52.
Sunday
Sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
Last Update:
1:26 pm PDT Oct 11, 2026
Forecast Valid:
3pm PDT Oct 11, 2026-6pm PDT Oct 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation