Sentosa Island, Singapore offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Sentosa Island is known for its pristine beaches, luxury resorts, and vibrant entertainment options. The best time to visit Sentosa Island, Singapore, is from December to June, with average air temperatures around 27-31°C (81-88°F) and water temperatures approximately 28-30°C (82-86°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!