Shimonoseki, Japan offers 30 beaches perfect for sunbathing, surfing, swimming, and more. Shimonoseki is known for the Kanmon Straits, Karato Market, and the Kaikyo Yume Tower. The best time to travel to Shimonoseki, Japan, is from late March to May when the average air temperature is around 15-20°C (59-68°F) and the water temperature is approximately 15-18°C (59-64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!