Satsumasendai, Japan offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Satsumasendai is known for the Sendai Nuclear Power Plant and the scenic Koshikijima Islands. The best time to travel to Satsumasendai, Japan, is in April when the average air temperature is around 18°C (64°F) and the water temperature is approximately 17°C (63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!