"Unseasonably" hot conditions were in the forecast Saturday and a beach hazard statement is in effect along the Orange County coast through Sunday evening, according to the National Weather Service.
Temperatures are expected to reach the lower to mid 70s along the coast Saturday, in the lower to mid 80s inland and up to the 90s in the valleys.
Weather service officials advised residents to limit outdoor activities, especially during daytime hours, drink lots of fluids that are not caffeine and alcohol, and to wear loose-fitting, lightweight and light-colored clothing.
The hot weather creates an elevated risk of heat-related illnesses and officials urge residents not to leave children or pets in an enclosed vehicle.
Waves and surf are expected between 3 to 5 feet and may reach 7 feet, officials said.
Surf will diminish Saturday evening, but some high sets are expected to continue and build again on Sunday.
The high surf brings dangerous conditions and strong rip currents.
Tidal overflow is also a concern, and officials advise beach goers to obey warning signs and talk to lifeguards before swimming.
Residents and visitors should also use caution in the water and to swim near a lifeguard.