Baan Haad Sai Ree, Thailand offers 1 beach perfect for sunbathing, surfing, swimming, and more. Baan Haad Sai Ree, Surat Thani, Thailand, is known for its beautiful beaches and vibrant nightlife on the island of Koh Tao. The best time to travel to Baan Haad Sai Ree, Thailand, is from December 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!