A Listly List - Heading to sunny Koh Samui for the summer? It is Thailand’s second-largest island and is famed for its stunning beaches, vibrant nightlife, and luxurious resorts. Here are the top 5 best beaches in Koh Samui that you must visit. - Bophut Beach, Chaweng Beach, Maenam Beach, Lamai Beach, and Silver Beach (Haad Thong Ta-khian)