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

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

59°F

15°C

Humidity 87%
Wind Speed WSW 3 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 02 Aug 06:35 AM PDT
Extended Forecast for

5 Miles ESE Lake Berryessa CA

  • Today

    Today: Sunny and hot, with a high near 103. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 103 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 67. Southwest wind around 6 mph becoming calm in the evening.

    Low: 67 °F

    Clear

  • Monday

    Monday: Sunny and hot, with a high near 104. Calm wind becoming northeast around 5 mph.

    High: 104 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 65. Southwest wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

Detailed Forecast

Today
Sunny and hot, with a high near 103. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Tonight
Clear, with a low around 67. Southwest wind around 6 mph becoming calm in the evening.
Monday
Sunny and hot, with a high near 104. Calm wind becoming northeast around 5 mph.
Monday Night
Clear, with a low around 65. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Sunny and hot, with a high near 99. Calm wind becoming south southwest around 5 mph in the afternoon.
Tuesday Night
Clear, with a low around 61.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
Clear, with a low around 60.
Thursday
Sunny and hot, with a high near 98.
Thursday Night
Clear, with a low around 62.
Friday
Sunny and hot, with a high near 101.
Friday Night
Clear, with a low around 65.
Saturday
Sunny and hot, with a high near 101.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles ESE Lake Berryessa CA
 38.54°N 122.18°W (Elev. 597 ft)
Last Update:
2:34 am PDT Aug 2, 2026
Forecast Valid:
6am PDT Aug 2, 2026-6pm PDT Aug 8, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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