Hakodate, Japan offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Hakodate is known for Mount Hakodate, Goryokaku Park, and the Hakodate Morning Market. The best time to travel to Hakodate, Japan, is in late spring (May to June) when the average air temperature is around 15-20°C (59-68°F) and the average sea temperature is about 10-15°C (50-59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!