The cause of death is pending toxicology results in about six weeks.
Hebert, 37, was found floating in the water off Olde Port Beach about 9:20 a.m. Wednesday. His body showed no obvious signs of trauma, and foul play is not suspected, sheriffs spokesman Tony Cipolla said in a news release.
Authorities believe Hebert was staying at one of the boats, which they say belonged to a relative. His kayak was found floating right side up near the pier several hours before his body was discovered.
Sheriffs officials say Hebert likely used that kayak to travel between the boat and the beach.