After otoplasty, it's generally recommended to avoid swimming and submerging the ears in water for about 4 to 6 weeks. This allows adequate time for the incisions to heal, reduce the risk of infection, and prevent complications. It's important to follow your surgeon's specific post-operative instructions regarding swimming and other activities to ensure optimal healing and the best possible results. If you have any doubts or concerns, it's always best to consult with your surgeon before resuming any water-related activities.