Odawara, Japan offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Odawara is known for Odawara Castle, a historic landmark and popular tourist attraction in the Kanto region of Japan. The best time to travel to Odawara, 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!