Rebun, Japan offers 1 beach perfect for sunbathing, surfing, swimming, and more. Rebun is known for its stunning alpine flowers and the scenic Rebun Island Trail. The best time to travel to Rebun, Japan, is from June to August, with average air temperatures around 15-20°C (59-68°F) and water temperatures around 10-15°C (50-59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!