Matsuyama, Japan offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Matsuyama, Shikoku, Japan, is known for its historic Dogo Onsen, one of the oldest hot springs in the country. The best time to travel to Matsuyama, Japan, is in April when the average air temperature is around 15°C (59°F) and the water temperature is approximately 16°C (61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!