Numazu, Japan offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Numazu is known for its stunning views of Mount Fuji, the Numazu Deep Sea Aquarium, and the scenic Numazu Port. The best time to travel to Numazu, Japan, is from April to June when the average air temperature is around 15-22°C (59-72°F) and the water temperature is approximately 16-20°C (61-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!