Dangjin si, South Korea offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Dangjin si is known for the Sapgyoho Tourist Park and the Dangjin Waemok Village. The best time to travel to Dangjin-si, South Korea, is in late spring (May), when the average air temperature is around 18°C (64°F) and the average water temperature is approximately 15°C (59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!