Sienna Toohey, the 17-year-old breaststroke phenom from Albury in regional New South Wales, has continued her assault on Australia's age record book by clocking 30.39 in the women's 50m breaststroke at the 2026 Australian Open on the Gold Coast.
The time set a new Australian 17-year-old age record and is also Toohey's personal best by more than three tenths of a second. She added the 100m breaststroke open-age title later in the meet in 1:06.69, edging Tara Kinder by 0.21 seconds and reinforcing the depth Australia now carries in an event Leisel Jones once owned.
Toohey's career arc since 2024 has been one of the most rapid in modern Australian swimming. As a 16-year-old at the 2025 Australian Trials, she upset a senior field to qualify for the World Aquatics Championships in Singapore — the youngest Australian female swimmer to qualify for a long-course Worlds since Cate Campbell. She finished sixth in the 100m breaststroke final in Singapore, clocking 1:06.34.
The Albury Swim Club product, who trains under coach Marcel Stewart, has been progressing through one age record after another for two years. Her latest hit list includes a 50m breaststroke 16-year-old all-comers record (set in 2025), the 100m 16-year-old age standard (also 2025), and now the 17-year-old 50m mark in Queensland.
The wider Australian Open meet was framed as a non-selection tune-up before June's Australian Trials in Adelaide, but produced a string of headline swims. Mollie O'Callaghan went 1:53.69 in the 200m freestyle and declared she had Ariarne Titmus' world record "in my sights". Lani Pallister won the 800m freestyle in 8:11.28. Kaylee McKeown skipped the 50m backstroke final to focus on a 200m IM tilt later in the meet.
Toohey's programme at the Gold Coast was confirmed as the 50 and 100 breaststroke. Swimming Australia coaches have been deliberate in keeping the Albury teenager's racing schedule tight while she continues to grow physiologically; her 50m breaststroke entry time of 30.61 had been her senior personal best since November.
The age record progression places Toohey within striking distance of the Australian senior records. Jessica Hansen's 50m breaststroke senior mark of 29.97 was set in 2024; Toohey's age-group time is the fastest by a 17-year-old Australian by 0.42 seconds and inside the senior European-standard A qualification benchmark for the World Aquatics Short Course Championships.
From the Gold Coast, Toohey moves to the 2026 Australian Age Championships and then on to the senior Trials in June. Her stated target for the Trials is the Pan-Pacific Championships in Tokyo in August, where the United States, Japan and China will field full senior squads. Australia's head breaststroke coach, Vince Raleigh, told Swimming World last week that Toohey's progression "keeps surprising even the people who have known her since she was 13. She's always one race ahead of the plan."
