Surat Thani, Thailand offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Surat Thani is known for being the gateway to the popular tourist islands of Koh Samui, Koh Phangan, and Koh Tao. The best time to travel to Surat Thani, Thailand, is from December to February, with average air temperatures around 27°C (81°F) and water temperatures about 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!