South32 Rottnest Channel Swim 2025 SAT 22 FEB 2025 5:00 AM - 5:00 PM Location: Cottesloe Beach Type: General Audience: All Ages The South32 Rottnest Channel Swim is a 19.7km open water swim from Cottesloe Beach (Mudurup) to Rottnest Island (Wadjemup). The 35th annual Rottnest Channel Swim will be held on Saturday, 22 February 2025.