A man who went missing while swimming at Lake San Antonio's South Shore beach on Sunday was found dead the following day after Monterey County dive teams searched the reservoir. Park rangers say the man did not know how to swim and was not wearing a life jacket when he entered the water.
Dive teams were called out Sunday to search for the missing swimmer, and county parks officials confirmed his body was recovered from the lake on Monday, according to KSBW. The station reported that rangers believe the man entered the water near the South Shore swim beach, and that his identity will not be released until next of kin has been notified.
No Lifeguards, No Life Jacket Requirement for Adults
The South Shore swim beach, like the rest of Lake San Antonio, has no lifeguards on duty, and Monterey County Parks regulations make clear that visitors swim at their own risk, according to a Monterey County Now report. Under California law, life jackets are mandatory for children under 13 on recreational vessels and for anyone operating a personal watercraft or being towed, but the state does not require adult swimmers at public lake beaches to wear flotation devices, per the California Division of Boating and Waterways.
That legal gap sits alongside a sobering national pattern. Roughly 40 million adults in the United States do not know how to swim, a factor the Centers for Disease Control and Prevention identifies as a leading contributor to adult drownings. U.S. Coast Guard data compiled by the National Safe Boating Council found that 76% of water-related fatalities are drownings, and 87% of those victims were not wearing a life jacket.
A Vast, Deep Reservoir Complicates Search Efforts
Lake San Antonio spans 5,720 surface acres with depths reaching 210 feet and about 60 miles of shoreline in southern Monterey County, a scale that shapes how searches unfold when someone goes missing beneath its surface. The reservoir, formed in 1965 by the San Antonio Dam, was built primarily for groundwater recharge and flood control rather than recreation. The Monterey County Sheriff's Office Search and Rescue Team, whose dive unit dates back to 1963, is the agency equipped for the kind of complex underwater search and recovery operation carried out this week.
The lake has also had a rocky recent history with recreational access. It closed indefinitely in July 2024 after hundreds of thousands of dead fish washed ashore in a massive die-off, following earlier multi-year closures tied to severe California droughts, as SFGATE reported. The South Shore area currently operates under County of Monterey guidelines that keep entry gates and mandatory boat inspection stations open Thursday through Monday, from 6 AM to 8 PM, with self-pay envelopes available when the gates are unstaffed.
Second Water Rescue Nearby Over the Same Weekend
The search at Lake San Antonio came the same weekend a Monterey County park ranger supervisor pulled an unconscious woman from nearby Lake Nacimiento and successfully resuscitated her with the help of bystanders, according to Paso Robles Daily News. Lake Nacimiento sits about seven miles from Lake San Antonio within the same county park system, meaning parks personnel were responding to two separate water emergencies within roughly a day of each other.
National data adds further context to who is most at risk in these incidents. CDC statistics show that nearly 80% of unintentional drowning victims in the United States are male, a disparity federal researchers attribute in part to greater water exposure and risk-taking behavior among men. The exact distance from shore where the man submerged, along with the official cause of death expected from the Monterey County Sheriff's Coroner Division, had not been released as of Monday.
It also remains unclear whether county officials plan to revisit signage or consider life-jacket loaner stations at the South Shore swim beach in response to the incident.
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