As of 2026, you can generally enter Sentosa’s beaches (Siloso, Palawan, and Tanjong) without a prior booking, as the strict reservation systems implemented during the pandemic years have been largely phased out for general beach access. You can simply walk onto the sand and enjoy the water at any time during park hours. However, a "booking" mindset is still helpful for specific experiences: if you intend to visit a popular beach club (like Ola or Rumours) or use specific facilities like Mega Adventure or the HydroDash floating aqua park, reservations are highly recommended, especially on weekends and public holidays. While the beach entry itself is free, remember that you still need to pay the standard Sentosa island admission fee via the Sentosa Express, drive-in gantries, or the boardwalk. For the best experience without crowds, aim to arrive before 11:00 AM on weekdays when the sand is most accessible.