National Weather Service Forecast for: Discovery Bay CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 8:57 am PDT Oct 6, 2026
 
Today

Today: Sunny and hot, with a high near 100. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Hot
 Tonight

Tonight: Clear, with a low around 64. Calm wind.
Clear
 Wednesday

Wednesday: Sunny and hot, with a high near 99. Calm wind becoming northwest around 6 mph in the afternoon.
Hot
 Wednesday
Night
Wednesday Night: Clear, with a low around 61. West northwest wind around 6 mph becoming calm in the evening.
Clear
 Thursday

Thursday: Sunny and hot, with a high near 99. Calm wind becoming north northwest around 6 mph in the afternoon.
Hot
 Thursday
Night
Thursday Night: Clear, with a low around 63.
Clear
 Friday

Friday: Sunny, with a high near 93.
Sunny
 Friday
Night
Friday Night: Clear, with a low around 59.
Clear
 Saturday

Saturday: Sunny, with a high near 83.
Sunny
Hi 100 °F Lo 64 °F Hi 99 °F Lo 61 °F Hi 99 °F Lo 63 °F Hi 93 °F Lo 59 °F Hi 83 °F

Heat Advisory
 

Today
 
 Sunny and hot, with a high near 100. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Tonight
 
 Clear, with a low around 64. Calm wind.
Wednesday
 
 Sunny and hot, with a high near 99. Calm wind becoming northwest around 6 mph in the afternoon.
Wednesday Night
 
 Clear, with a low around 61. West northwest wind around 6 mph becoming calm in the evening.
Thursday
 
 Sunny and hot, with a high near 99. Calm wind becoming north northwest around 6 mph in the afternoon.
Thursday Night
 
 Clear, with a low around 63.
Friday
 
 Sunny, with a high near 93.
Friday Night
 
 Clear, with a low around 59.
Saturday
 
 Sunny, with a high near 83.
Saturday Night
 
 Mostly clear, with a low around 54.
Sunday
 
 Sunny, with a high near 78.
Sunday Night
 
 Clear, with a low around 54.
Columbus Day
 
 Sunny, with a high near 80.

 

Forecast from NOAA-NWS for Discovery Bay CA.