Kolaka, Tamborasi, Indonesia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Kolaka, Tamborasi River, Sulawesi Tenggara, Indonesia, is known for the Tamborasi River, one of the shortest rivers in the world. The best time to travel to Kolaka, Tamborasi, Indonesia, is from June to September, with average air temperatures around 27°C (81°F) and water temperatures near 28°C (82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!