Riak Siabun, Indonesia offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Bengkulu is known for Fort Marlborough, the Thomas Parr Monument, and the beautiful Pantai Panjang beach. The best time to travel to Riak Siabun, Indonesia, is from May to September, with average air temperatures around 27°C (81°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!