Hills Grammar hosts two Swimming Carnivals each year. The Junior Swimming Carnival is for students in Years 3-6 and the Senior Swimming Carnival is for students in Years 7-12. Both are held at Waves Aquatic Centre, Baulkham Hills.
Students are given the opportunity to participate in traditional swimming events earning points for their House, and novelty events at each carnival give students who may not be strong swimmers an opportunity to contribute to the day. Results on the day are recorded to determine our Hills Grammar Representative Swimming team.