Thong Nian, Thailand offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Thong Nian is known for its proximity to the stunning Mu Ko Ang Thong National Park and the beautiful beaches of Khanom. The best time to travel to Thong Nian, Thailand, is from December to February, when the average air temperature is around 27°C (81°F) and the water temperature is approximately 28°C (82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!