Katsuura, Japan offers 8 beaches perfect for sunbathing, surfing, swimming, and more. Katsuura is known for the Katsuura Morning Market, one of the oldest morning markets in Japan. The best time to travel to Katsuura, Japan, is from late spring to early summer (May to June) when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 18-22°C (64-72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!