National Weather Service Forecast for: Napa CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 am PDT Jun 30, 2026
 
Today

Today: Partly sunny, then gradually becoming sunny, with a high near 79. Calm wind becoming south southwest 5 to 9 mph in the afternoon.
Becoming
Sunny
 Tonight

Tonight: Patchy fog after 3am. Otherwise, increasing clouds, with a low around 51. South wind around 6 mph becoming calm in the evening.
Clear then
Patchy Fog
 Wednesday

Wednesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 79. Calm wind becoming south southwest 5 to 9 mph in the afternoon.
Patchy Fog
then Sunny
 Wednesday
Night
Wednesday Night: Patchy fog after 5am. Otherwise, increasing clouds, with a low around 51. South southwest wind 5 to 8 mph becoming calm after midnight.
Mostly Clear
then Patchy
Fog
 Thursday

Thursday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 75. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Patchy Fog
then Sunny
 Thursday
Night
Thursday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 52.
Mostly Clear
then Patchy
Fog
 Friday

Friday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 81.
Patchy Fog
then Sunny
 Friday
Night
Friday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 54.
Clear then
Patchy Fog
 Independence
Day
Independence Day: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 82.
Patchy Fog
then Sunny
Hi 79 °F Lo 51 °F Hi 79 °F Lo 51 °F Hi 75 °F Lo 52 °F Hi 81 °F Lo 54 °F Hi 82 °F

 

Today
 
 Partly sunny, then gradually becoming sunny, with a high near 79. Calm wind becoming south southwest 5 to 9 mph in the afternoon.
Tonight
 
 Patchy fog after 3am. Otherwise, increasing clouds, with a low around 51. South wind around 6 mph becoming calm in the evening.
Wednesday
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 79. Calm wind becoming south southwest 5 to 9 mph in the afternoon.
Wednesday Night
 
 Patchy fog after 5am. Otherwise, increasing clouds, with a low around 51. South southwest wind 5 to 8 mph becoming calm after midnight.
Thursday
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 75. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Thursday Night
 
 Patchy fog after 5am. Otherwise, mostly clear, with a low around 52.
Friday
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 81.
Friday Night
 
 Patchy fog after 4am. Otherwise, mostly clear, with a low around 54.
Independence Day
 
 Patchy fog before 7am. Otherwise, mostly sunny, with a high near 82.
Saturday Night
 
 Mostly clear, with a low around 54.
Sunday
 
 Partly sunny, with a high near 79.
Sunday Night
 
 Partly cloudy, with a low around 53.
Monday
 
 Mostly sunny, with a high near 78.

 

Forecast from NOAA-NWS for Napa CA.