Okushiri, Japan offers 1 beach perfect for sunbathing, surfing, swimming, and more. Okushiri is known for its scenic beauty, including the Aonae Peninsula and the Nabetsuru Rock. The best time to travel to Okushiri, Japan, is from June to August, with average air temperatures around 20-25°C (68-77°F) and water temperatures around 18-22°C (64-72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!