Dachangshan, China offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Dachangshan, Liaoning, China, is known for its picturesque coastal scenery and seafood cuisine. The best time to travel to Dachangshan, China, is from June to August, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 22°C (72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!