The National Weather Service has issued a high surf advisory for beaches from Sonoma County to Monterey, where waves between 12 and 14 feet were forecast to hit the coast in 16 to 18 second intervals.
Locally, breakers could reach 18 feet this evening, according to the weather service.
The high surf advisory takes effect at noon and stays in effect through Monday morning, though higher-than-normal waves could last into Tuesday, according to the weather service.
Beachgoers were being advised to keep an eye on pets and keep off rocks near the surf.
High surf can cause sneaker waves, strong rip currents and erosion, especially on west-facing beaches.