The Phillip Island Grand Prix Circuit is located near the town of Ventnor on Phillip Island, an island connected to the Australian mainland south of Melbourne. The current permanent circuit configuration measures 4.448 kilometres and was opened in its modern form in December 1988 after a comprehensive refurbishment. The track is laid out along the island's coastline, with several corners exposed to Bass Strait winds that can dramatically affect handling and lap times.
Motor racing on Phillip Island dates to 1928, when the first Australian Grand Prix was held on a rectangular road circuit using closed public roads. A new triangular circuit was mapped out in 1935, and the site was eventually developed into the current Grand Prix Circuit after purchase and reconstruction in the mid-1980s. The island's challenging terrain, with its steep grades, contributed to cost overruns during the original 1950s construction and closure in 1962 after circuit damage, before the eventual reopening in 1988.
Phillip Island entered the Superbike World Championship calendar in 1990, the championship's third season, taking over from Oran Park Raceway as the Australian round. Australian riders Peter Goddard and Rob Phillis won the two races at the inaugural Phillip Island WorldSBK round. The circuit has hosted the Australian round of the Superbike World Championship continuously since then, establishing itself as a permanent fixture on the calendar.
The track also hosts the Australian Motorcycle Grand Prix, a round of the MotoGP World Championship, which returned to Phillip Island permanently from 1997 onwards after earlier stints at Eastern Creek. This dual role as a venue for both of motorcycle racing's premier international championships reinforces the circuit's significance in the global calendar.
Phillip Island is characterised by a series of fast, sweeping corners requiring exceptional commitment and machine stability. Gardner Straight, the main straight, allows superbikes to reach extremely high top speeds before the circuit turns into a demanding sequence of high-speed bends. The exposure to coastal winds introduces an unpredictable element that can shift race strategies mid-event, requiring teams and riders to adapt quickly.
The circuit holds FIM Category A track licence status, one of only two circuits in Australia with this classification, enabling it to host MotoGP-level machinery. The combination of high speeds, limited runoff in some areas, and variable coastal conditions makes Phillip Island technically demanding and often produces dramatic racing.
The circuit's location on Phillip Island links it to the earliest traditions of Australian motorsport. The island hosted the Australian Grand Prix from 1928 through 1935, making it the birthplace of that event. Troy Corser's 1996 Superbike World Championship title was clinched at Phillip Island, and the circuit has witnessed numerous championship-deciding moments across both WorldSBK and MotoGP. Casey Stoner, Australia's most recent MotoGP World Champion, won the Australian Grand Prix at Phillip Island six consecutive times, cementing the venue's place in the country's motorsport identity.