Minamiboso, Japan offers 19 beaches perfect for sunbathing, surfing, swimming, and more. Minamiboso is known for the Shirahama Flower Park and the Nojimazaki Lighthouse. The best time to travel to Minamiboso, Japan, is from April to June, with average air temperatures around 15-25°C (59-77°F) and water temperatures ranging from 16-21°C (61-70°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!