Perth death not suspicious

The circumstances around the death of a man whose body was found off a Perth beach are not believed to be suspicious.

An Australian has died in a swimming accident off a beach at the Thai resort island of Koh Samui. (AAP)

The death of a man whose body was found off a Perth beach is not being treated as suspicious.

The man, aged in his 50s, was found in the water north of Trigg Beach during a jet ski patrol on Friday.