Onna, Japan offers 19 beaches perfect for sunbathing, surfing, swimming, and more. Onna, Kyushu, Japan, is known for its beautiful beaches and the Cape Manzamo scenic viewpoint. The best time to travel to Onna, Japan, is from April to June, with average air temperatures around 20-28°C (68-82°F) and water temperatures ranging from 22-26°C (72-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!
