The blazes were reported before 9:45 p.m. A spokesperson for the San Diego Fire-Rescue Department reports that firefighters arrived to find the boats well-involved in flames.
The fires were both contained by 10:15 p.m., according to San Diego Fire-Rescue. No one was aboard either boat and there were no confirmed injuries.
The boats were both so badly damaged they are in danger of sinking, the spokesperson said.
The U.S. Coast Guard has been notified. The cause is under investigation.