The San Francisco Fire Department is conducting a rescue operation after a surfer ventured out amid Tsunami Advisory conditions.
The man was swept 300 feet offshore while surfing Kelly's Cove at San Francisco's Ocean Beach, fire authorities reported.

At around 2:30 p.m., fire officials received reports of a surfer in distress, Lieutenant John Baxter told KCBS Radio.
Onlookers told officials they saw the surfer's board snap in half during a surge wave and then lost sight of him under the water.
With assistance from the U.S. Coast Guard helicopter crew and small boat team, rescue crews were able to locate and swim out to the victim.
"The surf conditions were so severe that we required placing the victim onto a U.S. Coast Guard vessel and then monitoring our rescue swimmers as they were able to make it back to shore," Baxter told KCBS Radio.
All rescue swimmers are now safely onshore and the victim required no further medical attention, he said.
A second surf rescue is now underway from the same location off the coast of San Francisco, Baxter informed KCBS Radio. He strongly advised residents to stay away from the beaches.
"The surf may look non-intimidating in some areas based off the size of the wave length, however, what's very cautious and very dangerous is the undertow and the ripcurrent," he said.