Manresa State Beach is a state-protected beach on Monterey Bay near Watsonville in Santa Cruz County, California.
It is operated by the California Department of Parks and Recreation. The 138-acre site was established as a California state park in 1948.Manresa State Beach hosts the junior lifeguard program which runs two sessions each summer, teaching lifesaving, fitness and water safety to children in Santa Cruz County. Many local surfers were once junior lifeguards in the program. South of Manresa State Beach is Sunset State Beach.