Bosua, Indonesia offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Bosua, West Sumatra, Indonesia, is known for its proximity to the Mentawai Islands, which are famous for world-class surfing spots. The best time to travel to Bosua, Indonesia, is from May to September, with average air temperatures around 82°F (28°C) and water temperatures near 82°F (28°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!