Saiki, Japan offers 14 beaches perfect for sunbathing, surfing, swimming, and more. Saiki is known for its Usuki Stone Buddhas and the scenic Saiki Bay in Kyushu, Japan. The best time to travel to Saiki, Japan, is in April when the average air temperature is around 16°C (61°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!