Otaru, Japan offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Otaru is known for its picturesque Otaru Canal, historic Sakaimachi Street, and the Otaru Music Box Museum. The best time to travel to Otaru, Japan, is from June to September, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 18-22°C (64-72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!