Sendai, Japan offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Sendai is known for the Sendai Tanabata Festival, the Zuihoden Mausoleum, and the Aoba Castle ruins. The best time to travel to Sendai, Japan, is in late spring (May), when the average air temperature is around 17°C (63°F) and the average water temperature is approximately 15°C (59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!