is an island with the most clear water in the Gulf of Thailand. So there are some beautiful beaches
with huge boulders, but the main attraction is a snorkeling. In addition, due to the relatively small size of the island, there are many spectacular mountain trails, allowing to walk from one coast to another. Shore and seabed: sand, stones. 
Koh Tao has a lot of hotels for every budget. However, you can hardly find options for US$10 per night. But there are many hotels from US$30, located on an almost private beach, - as there are many secluded bays on the island. Find hotels in Koh Tao
How to get there 
Fly to Bangkok international airport (BKK)
. Next get to Koh Tao by Lomprayah
catamaran. Please note, that from Bangkok to Chumphon
you will get by bus anyway.
In many cases you may just walk to reach your destination, as Ko Tao island is relatively small. But the most popular transport options are water taxi, shuttle minibuses and car taxi. Find flights to Koh Tao
When to go 
The best time for a holiday on the island of Koh Tao in Thailand is a dry season from late December to September. Please note, that October and November is a period of extremely heavy rains.
Water temperature, C
Wind speed, meter/sec