The 10 Swedes, who were in Perth on a three-week training camp from Stockholm, included 17-year-old Gustav Swedenborg, a world-class open water swimmer for his age.
Swedenborg won the U18 5km swim with a time of 1.03.32.
In the U17 1.25km race, Swedenborg’s team mates William Josefsson-Rudberg and Viktor Fridsjo came first and second respectively.
Their coach Marcus Aradsson said open water swimming was not common in Sweden because of the cold climate.
“Everything I have learnt about open water swimming is from being here (working with Perth City Swimming Club) and I’m using that knowledge to develop open water swimming in Sweden,” he said.
The WA Open Water championship continues this weekend with round 9 in Mandurah.
At Shorehaven, open water coach Paul Newsome will host a free five-week beach swimming program.
Commencing on Sunday, the two-hour sessions are open to all over the age of nine. Register by emailing email@example.com with your level of swimming experience.