Amongst the college's Rugby highlights was winning by the First XV of the New Zealand Secondary School's Top Four Championship and the Auckland Secondary Schools Premiership in 1987. The latter feat was repeated in 1988. The college won the Auckland Championship and the New Zealand First XV Knock out competition undefeated in 2000. Most recently, St Peter's won the Auckland Secondary Schools Premiership and the National First XV Championship final in 2018. The college has gained the Moascar Cup (national school 1st XV rugby honour) three times, in 1977, 2000 and 2018.