Shirahama, Japan offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Ivoini, Ngazidja, Comoros, is known for its proximity to Mount Karthala, one of the world's largest active volcanoes. The best time to travel to Shirahama, Japan, is from late spring to early autumn (May to September), with average air temperatures ranging from 20°C to 30°C (68°F to 86°F) and water temperatures around 22°C to 27°C (72°F to 81°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!