Sacheon si, South Korea offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sacheon si is known for the Sacheon Aerospace Museum and the Namhae Bridge. The best time to travel to Sacheon-si, South Korea, is in late spring (May) when the average air temperature is around 18°C (64°F) and the water temperature is approximately 16°C (61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!