Jongkat, Indonesia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Jongkat is known for its proximity to the Danau Sentarum National Park, a unique wetland ecosystem in West Kalimantan, Indonesia. The best time to travel to Jongkat, 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!