Tambon Ko Phayam, Thailand offers 1 beach perfect for sunbathing, surfing, swimming, and more. Tambon Ko Phayam, Ranong, Thailand, is known for its serene beaches and the vibrant Ao Yai and Ao Khao Kwai bays. The best time to travel to Tambon Ko Phayam, Thailand, is from November to February, when the average air temperature is around 28°C (82°F) and the water temperature is approximately 27°C (81°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!