DANA POINT, Calif. (KTLA) -- Authorities have identified the body of a man recovered off Dana Point Saturday as the swimmer who went missing in big surf over Labor Day weekend.

Frank Daniel Austin, 34, of Rowland Heights, was last seen going into the water at Salt Creek Beach around 4 p.m. on Sunday, Sept. 2. His mother reported him missing just after 7 p.m., authorities said.

His body was found by sheriff's deputies and the Dana Point Harbor Patrol around 8:45 a.m. Saturday about 100 yards offshore of Monarch Beach

Austin's disappearance prompted a four-day search by the U.S. Coast Guard and the Orange County Sheriff's Department's Harbor Patrol.

He was swimming in an area where lifeguards were posted, but there was a high surf advisory in effect, with remnants from Hurricane Ileana generating waves up to 7 feet tall.

The search for Austin was scaled back on Monday, with deputies changing the operation to a recovery effort.

Divers resumed the search for Austin on Wednesday morning, but stopped about three hours later.

An autopsy will be conducted this week to determine the cause of death, coroner's officials said.