The diving events at the 2009 Southeast Asian Games took place at the Swimming Pool, National Sports Complex. The Diving events were held from 11 December to 14 December, with 8 gold medals up for contention.
The Water polo events was held from 5 December to 7 December 2009. Four teams were in competition in a round-robin format, with defending champion Singapore retaining its title which it has won 23 times consecutively since Singapore gained independence in 1965, inclusive of the current games.