A high surf advisory for the entire Bay Area region is in effect until 3 p.m. today, according to the California Office of Emergency Services.
Swells generated by a storm system in the Gulf of Alaska are expected to produce large breaking waves from 15 to 20 feet high.
Beaches that face west or northwest are at greatest risk for erosion and rip currents.
Officials advise anyone entering the water in these areas to plan an escape route when entering water in coves or around rocks because swiftly rising swells may prevent the safe return to dry land.
Dangerous rip currents and “sneaker waves” are associated with these swells.