Diving in Samui sucks. The water is murky and shallow and there just isn't that much too see, even if you could. When I was there last year, during most the month of Sept, most of the dive operations were closed down due to the extreme shallowness like it had something to do with the season? There is a little island off Samui that has great snorkeling but even that, I was told, had been murky all year up to the day we got there.

The good news. You won't care about diving when you get there. $20 a nite air-conditioned bungalows on the beach, hour massages for less than $5, cheap motorbike rentals that will take you to deserted beaches, and the sunsets! Incredible.

I would go back in a hot second - have a wonderful time!

http://igougo.com/planning/journal.asp?JournalID=7912