Hikari, Japan offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Hikari is known for its beautiful coastal scenery along the Seto Inland Sea and the Hikari Seaside Park. The best time to travel to Hikari, 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!