National Weather Service Forecast for: Napa CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 12:26 am PST Feb 2, 2026
 
Overnight

Overnight: Areas of fog. Otherwise, mostly clear, with a steady temperature around 44. Calm wind.
Areas Fog
 Monday

Monday: Areas of fog before 9am. Otherwise, sunny, with a high near 67. Calm wind becoming south southwest around 5 mph in the afternoon.
Areas Fog
then Sunny
 Monday
Night
Monday Night: Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 41. Calm wind.
Patchy Fog
 Tuesday

Tuesday: Areas of fog before 9am. Otherwise, sunny, with a high near 68. Calm wind becoming east northeast around 5 mph in the afternoon.
Areas Fog
then Sunny
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 41. Calm wind.
Mostly Clear
 Wednesday

Wednesday: Sunny, with a high near 68.
Sunny
 Wednesday
Night
Wednesday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 42.
Clear then
Patchy Fog
 Thursday

Thursday: Patchy fog before 8am. Otherwise, sunny, with a high near 66.
Patchy Fog
then Sunny
 Thursday
Night
Thursday Night: Mostly cloudy, with a low around 45.
Mostly Cloudy
Lo 44 °F Hi 67 °F Lo 41 °F Hi 68 °F Lo 41 °F Hi 68 °F Lo 42 °F Hi 66 °F Lo 45 °F

Coastal Flood Advisory
 

Overnight
 
 Areas of fog. Otherwise, mostly clear, with a steady temperature around 44. Calm wind.
Monday
 
 Areas of fog before 9am. Otherwise, sunny, with a high near 67. Calm wind becoming south southwest around 5 mph in the afternoon.
Monday Night
 
 Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 41. Calm wind.
Tuesday
 
 Areas of fog before 9am. Otherwise, sunny, with a high near 68. Calm wind becoming east northeast around 5 mph in the afternoon.
Tuesday Night
 
 Mostly clear, with a low around 41. Calm wind.
Wednesday
 
 Sunny, with a high near 68.
Wednesday Night
 
 Patchy fog after 4am. Otherwise, mostly clear, with a low around 42.
Thursday
 
 Patchy fog before 8am. Otherwise, sunny, with a high near 66.
Thursday Night
 
 Mostly cloudy, with a low around 45.
Friday
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 66.
Friday Night
 
 Widespread fog. Otherwise, partly cloudy, with a low around 44.
Saturday
 
 Widespread fog. Otherwise, mostly sunny, with a high near 65.
Saturday Night
 
 Widespread fog. Otherwise, partly cloudy, with a low around 45.
Sunday
 
 A slight chance of rain. Areas of fog. Otherwise, partly sunny, with a high near 66.

 

Forecast from NOAA-NWS for Napa CA.