National Weather Service Forecast for: Hercules CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 pm PDT May 26, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 67. West wind 14 to 16 mph, with gusts as high as 24 mph.
Sunny

 Tonight

Tonight: Mostly clear, with a low around 49. West wind 5 to 15 mph, with gusts as high as 23 mph.
Mostly Clear

 Wednesday

Wednesday: Mostly sunny, with a high near 67. Southwest wind 5 to 10 mph.
Mostly Sunny

 Wednesday
Night
Wednesday Night: A 20 percent chance of rain after 4am. Mostly cloudy, with a low around 51. South southwest wind 5 to 8 mph.
Partly Cloudy
then Slight
Chance Rain
 Thursday

Thursday: A 30 percent chance of rain before 11am. Partly sunny, with a high near 68. South southwest wind 5 to 9 mph. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
then Mostly
Sunny
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 52.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 65.
Mostly Sunny

 Friday
Night
Friday Night: Mostly clear, with a low around 52.
Mostly Clear

 Saturday

Saturday: Mostly sunny, with a high near 71.
Mostly Sunny
Hi 67 °F Lo 49 °F Hi 67 °F Lo 51 °F Hi 68 °F Lo 52 °F Hi 65 °F Lo 52 °F Hi 71 °F

 

This Afternoon
 
 Sunny, with a high near 67. West wind 14 to 16 mph, with gusts as high as 24 mph.
Tonight
 
 Mostly clear, with a low around 49. West wind 5 to 15 mph, with gusts as high as 23 mph.
Wednesday
 
 Mostly sunny, with a high near 67. Southwest wind 5 to 10 mph.
Wednesday Night
 
 A 20 percent chance of rain after 4am. Mostly cloudy, with a low around 51. South southwest wind 5 to 8 mph.
Thursday
 
 A 30 percent chance of rain before 11am. Partly sunny, with a high near 68. South southwest wind 5 to 9 mph. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
 
 Partly cloudy, with a low around 52.
Friday
 
 Mostly sunny, with a high near 65.
Friday Night
 
 Mostly clear, with a low around 52.
Saturday
 
 Mostly sunny, with a high near 71.
Saturday Night
 
 Clear, with a low around 50.
Sunday
 
 Sunny, with a high near 76.
Sunday Night
 
 Clear, with a low around 52.
Monday
 
 Sunny, with a high near 77.

 

Forecast from NOAA-NWS for Hercules CA.