Sasebo, Japan offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Sasebo is known for Huis Ten Bosch, a Dutch-themed amusement park, and the Kujukushima Islands. The best time to travel to Sasebo, Japan, is in late spring (May), when the average air temperature is around 20°C (68°F) and the water temperature is approximately 19°C (66°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!