Ong, Cambodia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sihanoukville is known for its beautiful beaches, such as Ochheuteal and Serendipity, and the nearby islands like Koh Rong. The best time to travel to Ong, Cambodia, is from November to February, with average air temperatures around 25-30°C (77-86°F) and water temperatures near 28°C (82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!