Biduk Biduk, Indonesia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Biduk Biduk is known for Labuan Cermin, a unique two-layered lake with both freshwater and saltwater. The best time to travel to Biduk Biduk, Indonesia, is from May to September, with average air temperatures around 28°C (82°F) and water temperatures near 29°C (84°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!