Yes, you can shower in Sentosa at several locations across the island's three main beaches: Siloso, Palawan, and Tanjong. Each beach features public restrooms equipped with outdoor open-air shower heads for rinsing off sand and salt water, which are free of charge. For a more private or premium experience, many of the beach clubs, such as Rumours Beach Club or the family-oriented Splash Tribe at The Palawan, offer indoor shower facilities and changing rooms for their patrons. These clubs often require a minimum spend or an entry fee but provide towels and toiletries. Additionally, some attractions like Adventure Cove Waterpark have full shower and locker facilities included with the price of admission. If you are a visitor just spending a few hours on the public sand, the outdoor communal showers located near the "Beach Station" monorail hub are the most accessible and frequently used option.