National Weather Service Forecast for: Hercules CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:36 pm PDT Jul 12, 2026
 
Tonight

Tonight: Mostly cloudy, with a low around 59. South southwest wind 5 to 7 mph.
Mostly Cloudy
 Monday

Monday: Mostly cloudy, then gradually becoming sunny, with a high near 84. Southwest wind 3 to 7 mph.
Decreasing
Clouds
 Monday
Night
Monday Night: Partly cloudy, with a low around 62. South southwest wind around 7 mph.
Partly Cloudy
 Tuesday

Tuesday: Sunny, with a high near 85. Southwest wind 6 to 10 mph.
Sunny
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 59. South southwest wind around 9 mph.
Mostly Clear
 Wednesday

Wednesday: Sunny, with a high near 83.
Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 56.
Mostly Clear
 Thursday

Thursday: Mostly sunny, with a high near 77.
Mostly Sunny
 Thursday
Night
Thursday Night: Mostly clear, with a low around 55.
Mostly Clear
Lo 59 °F Hi 84 °F Lo 62 °F Hi 85 °F Lo 59 °F Hi 83 °F Lo 56 °F Hi 77 °F Lo 55 °F

 

Tonight
 
 Mostly cloudy, with a low around 59. South southwest wind 5 to 7 mph.
Monday
 
 Mostly cloudy, then gradually becoming sunny, with a high near 84. Southwest wind 3 to 7 mph.
Monday Night
 
 Partly cloudy, with a low around 62. South southwest wind around 7 mph.
Tuesday
 
 Sunny, with a high near 85. Southwest wind 6 to 10 mph.
Tuesday Night
 
 Mostly clear, with a low around 59. South southwest wind around 9 mph.
Wednesday
 
 Sunny, with a high near 83.
Wednesday Night
 
 Mostly clear, with a low around 56.
Thursday
 
 Mostly sunny, with a high near 77.
Thursday Night
 
 Mostly clear, with a low around 55.
Friday
 
 Mostly sunny, with a high near 72.
Friday Night
 
 Partly cloudy, with a low around 56.
Saturday
 
 Partly sunny, with a high near 72.
Saturday Night
 
 Partly cloudy, with a low around 57.
Sunday
 
 Partly sunny, with a high near 74.

 

Forecast from NOAA-NWS for Hercules CA.