Swim Thru Perth

The Swan River at Matilda Bay does not behave like the open ocean. It is a wide, estuarine body of water, characterized by its stillness and a lack of the rhythmic swell that dominates the nearby coastline. When you enter the water here, you feel the density of a river system that has carved its path through the limestone of the Perth basin over millennia. The water is generally dark, reflecting the surrounding peppermint trees and the sharp verticality of the city skyline, but it remains remarkably consistent in its temperament, rarely showing the chop that forces swimmers to adjust their stroke mid-race. You are navigating a historical waterway; this event, organized by the Claremont Masters, has been held annually since 1912, making it the oldest of its kind in Australia.

Race day on the river

On the morning of January 18, 2026, the bay will host four distances: 250m, 800m, 1600m, and 3500m. The course is set in the protected indentation of the bay, starting near the Royal Perth Yacht Club. For the 800m and 1600m distances, the path is straightforward: a 340m straight line toward a turn buoy, followed by a return leg that mirrors the outbound track. The 1600m event simply doubles this effort. The 3500m distance extends the challenge, taking full advantage of the calmer, flatter stretches of the river. Because the event is staged in a high-traffic area for local recreational boating, the course is defined by a rigid system of buoys and a floating finish boom to manage the transit of both swimmers and watercraft. It is common to see the local fauna here; black swans are permanent residents of these banks, and it is not unheard of for dolphins to surface in the channel during the summer months. The organization focuses on a community-led structure, prioritizing a clear, safe line through the river rather than the unpredictability of surf, allowing for a steady, rhythmic pace from start to finish.