Suttu, Japan offers 1 beach perfect for sunbathing, surfing, swimming, and more. Suttu, Hokkaido, Japan, is known for its proximity to the scenic Shakotan Peninsula and the beautiful Shakotan Blue ocean waters. The best time to travel to Suttu, Japan, is during late spring (May), when the average air temperature is around 15°C (59°F) and the water temperature is approximately 10°C (50°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!