round diving while the more exciting west coast is perfect between December and April. • Ideal location: East coast: Koh Tao, Koh Samui West coast: Phuket, Similan Islands, Surin Islands, Hin Daeng, Hin Muang • Approximate cost: A day trip with two dives starts from 3000 Baht, varying as per the site and number of dives (Equipment included)