Sanyoonoda, Japan offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Sanyoonoda is known for its beautiful coastal scenery and serene beaches. The best time to travel to Sanyoonoda, Japan, is in April when the average air temperature is around 15°C (59°F) and the average 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!