Dive Victoria at Portsea organises scuba diving and snorkelling adventures.
Fishing charters and boat hire opportunities are scattered along the peninsula, with charters leaving from a variety of points including Sorrento, Mornington and Rosebud.
There are main popular sailing clubs and the peninsula hosts international sailing regattas. There is Safety Beach Sailing Club, McCrae Yacht Club and Blairgowrie yacht club, as well as others.
The newly completed Peninsula and Aquatic Recreation Centre (PARC) has been built at Frankston.