Aioi, Japan offers 1 beach perfect for sunbathing, surfing, swimming, and more. Aioi is known for the Aioi Peron Festival, featuring dragon boat races and vibrant cultural celebrations. The best time to travel to Aioi, Japan, is in April when the average air temperature is around 15°C (59°F) and the water temperature is approximately 14°C (57°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!