Hitachinaka, Japan offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Hitachinaka is known for Hitachi Seaside Park, a popular tourist destination famous for its seasonal flower displays. The best time to travel to Hitachinaka, Japan, is in late spring (May), when the average air temperature is around 18°C (64°F) and the average water temperature is about 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!