Tambon Ko Chang, Thailand offers 1 beach perfect for sunbathing, surfing, swimming, and more. Tambon Ko Chang, Trat, Thailand, is known for Mu Ko Chang National Park. The best time to travel to Tambon Ko Chang, Thailand, is between November and 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!