Rottnest Island hosts Swim Thru Rotto on 5 December

Rottnest Island (Wadjemup) hosts Swim Thru Rotto on 5 December 2026, bringing an open-water swimming event to the island near Perth in Western Australia. The community event is presented by The Cottesloe Crabs Winter Swimming Club and offers 500m and 1600m courses.

Swim Thru Rotto brings two courses on 5 December

The event page confirms that Swim Thru Rotto takes place on Saturday 5 December 2026 in protected waters around the island. The organiser describes the programme as a choice between a 500m swim and a 1600m swim, giving the event a short course and a longer course without changing its focus on open-water swimming.

The Cottesloe Crabs have hosted the event since 1977, and their 2026 page identifies it as the 48th annual event. The organiser's page sets the date and courses, while the club's own event page confirms the 5 December programme and its Rottnest Island setting.

Protected waters connect the swim with Wadjemup

The swimming courses take place in the protected waters around the island rather than on a mainland course. That setting links the event directly to the marine environment that shapes the visitor experience at Rottnest Island, while the two distances give the programme a clear sporting structure.

The Rottnest Island Authority is the statutory body responsible for managing Wadjemup on behalf of the Western Australian government. It has worked to maintain and improve the island since 1987 and describes the reserve as a place combining recreational, environmental and cultural heritage values. Its history page records that the first governing body was founded in the late 1830s and that the Rottnest Island Board was appointed in 1895. These management dates place the 2026 swim within a much longer history of public use and administration. The authority's management history for Wadjemup also identifies the island's continuing cultural significance.

Ferry routes shape access to the December event

The event's island location means that visitors must arrange their journey across the water before reaching the swimming area. The operator's visitor information lists ferry departures from Perth City, North Fremantle at Rous Head, Fremantle at Victoria Quay and Hillarys Boat Harbour in Perth's north. The island's official ferry information names three ferry operators serving those departure points.

The event is therefore more than a date in a sports calendar for travellers from Western Europe. On 5 December 2026, the course location places the swim in the island's protected waters, while access remains dependent on a ferry journey from Perth or Fremantle. The organiser's page should be checked for any later location update before travel, because the 2026 page notes that further information may be issued.

Visiting Rottnest Island: what travellers from Western Europe should know

• Swim Thru Rotto takes place on Saturday 5 December 2026 in protected waters at Rottnest Island, with 500m and 1600m courses.
• The event is presented by The Cottesloe Crabs Winter Swimming Club, and the official 2026 page is the place to check for any location update.
• Ferries leave for the island from Perth City, North Fremantle at Rous Head, Fremantle at Victoria Quay and Hillarys Boat Harbour.
• The island is managed as a Class A Reserve by the Rottnest Island Authority, which has worked there since 1987.

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Frequently asked questions about Rottnest Island

When does Swim Thru Rotto take place at Rottnest Island?

Swim Thru Rotto takes place on Saturday 5 December 2026, with 500m and 1600m open-water courses.

What is Rottnest Island?

It is a Class A Reserve managed by the Rottnest Island Authority, with recreational, environmental and cultural heritage values.

Where is Rottnest Island and how do you get there?

The island lies off Western Australia and is served by ferries from Perth City, North Fremantle, Fremantle and Hillarys Boat Harbour.