• DateNameSwim Time
• 7 September 1977Cynthia Nicholas19 hours, 55 minutes
• 4 August 1979Cynthia Nicholas19 hours, 12 minutes
• 28 August 1982Cynthia Nicholas18 hours, 55 minutes
• 18 August 1983Irene Van der Laan18 hours, 15 minutes
• 22 July 1991Susie Maroney17 hours, 14 minutes