Riau Slip, Indonesia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Riau Slip, Bangka Belitung Islands, Indonesia, is known for its proximity to the stunning beaches and granite rock formations of Belitung Island. The best time to travel to Riau Slip, Indonesia, is from June 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!