While Singapore is a bustling island nation, you can definitely swim in the ocean at several designated beach areas, with Sentosa Island being the most popular choice. Sentosa features three main beaches: Siloso, Palawan, and Tanjong, all of which have areas cordoned off for swimming and are monitored by the Sentosa Beach Patrol. In 2026, Palawan Beach is particularly favored by families due to its calm waters and kid-friendly facilities. For a more "rustic" and less crowded experience, you can head to East Coast Park, which has a 15km stretch of coastline; however, you should be mindful of the large number of ships anchored in the distance, which can occasionally affect water clarity. For the cleanest and most "tropical" swimming experience in 2026, locals and tourists take a short ferry to the Southern Islands, specifically Lazarus Island and St. John's Island. The C-shaped lagoon at Lazarus Island offers pristine, turquoise water that is widely considered the best swimming spot in Singapore. It is important to always check the water quality and "Jellyfish Season" alerts on the National Environment Agency (NEA) app before diving in, as Singapore's position in a major shipping lane means the water conditions can change quickly.