Tokai, Japan offers 1 beach perfect for sunbathing, surfing, swimming, and more. Tokai is known for the Tokai Nuclear Power Plant and its proximity to the scenic Ibaraki coastline. The best time to travel to Tokai, Japan, is in April when the average air temperature is around 15°C (59°F) and the water temperature is approximately 14°C (57°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!