Naha, Japan offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Naha is known for Shuri Castle and Kokusai Street. The best time to travel to Naha, Japan, is from late March to early May, with average air temperatures around 20-25°C (68-77°F) and water temperatures around 22-24°C (72-75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!