Scuba diving is by far the biggest attraction on Ko Tao, and it is easy, fun, and you will see a lot of fish, perhaps even turtles, stingrays, barracuda, reef sharks, and even a whale shark if you get lucky

You will get good diving weather on Koh Tao apart from November, when the sea is choppy, and visibility is poorer than normal. The visibility can be over 40 metres during the rest of the year.
You will find a lot of dive operators on the island, and some of them offer accommodation. Just beware that when you read the accommodation is free, it’s not really, because they will offer discounts if you stay somewhere else.

In the region the price is 9,800 THB for a PADI open water certificate, and this should include the new PADI training manual, proper professional instruction, rental equipment, boat dives etc. This may include insurance and basic accommodation, but shop around, and remember the methods of instruction may differ enormously. A few hints include avoiding shops that use swimming pools to teach you in. You’ll find it cold, boring, and unhygienic, bearing in mind this is a very popular diving island, and they will have literally hundreds of students .
Choose one that will take you to a private beach so you will see fish and coral right away, it is a lot more interesting, and you will probably get more dives!!
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It’s also a good idea to find a dive shop that has its own private pier, so you won’t have to cl...