Waterparks like Coco Splash Adventure & Waterpark are perfect places to go when the heat gets unbearable. Koh Samui is a great place for families, with something for everyone to do. Consider planning your trip to Koh Samui for the months of June, July, and August if you have interest in visiting amusement or water parks. Flights to Koh Samui are very popular around then, and it is recommended that you plan early.