Tumpak, Indonesia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Tumpak, West Nusa Tenggara, Indonesia, is known for its proximity to Mount Rinjani and the stunning Segara Anak Lake. The best time to travel to Tumpak, Indonesia, is from May 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!