Snorkeling and Scuba diving in Sihanoukville thrives because of the area's favourable topographical features. Offshore local waters are warm and the visibility is low but it is better to dive out by neighbouring islands and Condor Reef as visibility is superior there.

Snorkeling, also, can be impressive around the nearby islands which feature rocky reefs, shallow waters and coral, and colourful tropical fish. Diving and snorkeling from December to June is ideal because the water is clearer and cooler than the rest of the year. Professional guidance is available on the beach to assist divers and the snorkellers.