The competition included 18 clubs from across WA, with 900 competitors taking part on Saturday and Sunday in calm conditions.
Secret Harbour finished 10th, two places ahead of their 2012 result.
Samantha Lowe and Jessica Williams finished fourth in the board rescue, while Williams finished fifth in the board race.
Lauren Steward and Christopher Collins both finished fourth in beach flags, while Jordan Edgar finished fourth in beach sprints.
The Secret Harbour under-11 female board relay team finished fifth.
The under-13 male surf team finished sixth.
Alex Bussey and Luke Van Koolbergen finished fifth in the under-12 board rescue.
The club also won a bronze medal in the Junior March Past.