National Weather Service Forecast for: Discovery Bay CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 12:26 am PST Dec 5, 2025
 
Overnight

Overnight: Partly cloudy, with a low around 40. Calm wind.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 59. Light and variable wind.
Mostly Sunny

 Friday
Night
Friday Night: Mostly clear, with a low around 42. Calm wind becoming southeast around 5 mph after midnight.
Mostly Clear

 Saturday

Saturday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 61. Calm wind becoming north northwest around 6 mph in the morning.
Patchy Fog
then Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 45. West northwest wind 3 to 5 mph.
Mostly Clear

 Sunday

Sunday: Partly sunny, with a high near 62.
Partly Sunny

 Sunday
Night
Sunday Night: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 45.
Partly Cloudy
then Patchy
Fog
 Monday

Monday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 62.
Patchy Fog
then Mostly
Sunny
 Monday
Night
Monday Night: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 44.
Partly Cloudy
then Patchy
Fog
Lo 40 °F Hi 59 °F Lo 42 °F Hi 61 °F Lo 45 °F Hi 62 °F Lo 45 °F Hi 62 °F Lo 44 °F

 

Overnight
 
 Partly cloudy, with a low around 40. Calm wind.
Friday
 
 Mostly sunny, with a high near 59. Light and variable wind.
Friday Night
 
 Mostly clear, with a low around 42. Calm wind becoming southeast around 5 mph after midnight.
Saturday
 
 Patchy fog before 7am. Otherwise, mostly sunny, with a high near 61. Calm wind becoming north northwest around 6 mph in the morning.
Saturday Night
 
 Mostly clear, with a low around 45. West northwest wind 3 to 5 mph.
Sunday
 
 Partly sunny, with a high near 62.
Sunday Night
 
 Patchy fog after 1am. Otherwise, partly cloudy, with a low around 45.
Monday
 
 Patchy fog before 9am. Otherwise, partly sunny, with a high near 62.
Monday Night
 
 Patchy fog after 5am. Otherwise, partly cloudy, with a low around 44.
Tuesday
 
 Patchy fog before 8am. Otherwise, partly sunny, with a high near 61.
Tuesday Night
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 45.
Wednesday
 
 Patchy fog. Otherwise, partly sunny, with a high near 62.
Wednesday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 46.
Thursday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 63.

 

Forecast from NOAA-NWS for Discovery Bay CA.