Tokio, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Tokio, North Dakota, United States, is not widely recognized for tourism attractions. The best time to travel to Tokyo, Japan, is during spring (March to May) when the average air temperature is around 50-70°F (10-21°C) and water temperature is approximately 50-60°F (10-16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!