Richelieu Rock day trip
If you have just one day to dive in Thailand (and you are staying in Khao Lak) the best dive site is Richelieu Rock.
A day trip with two dives to Richelieu Rock departs three days per week between November and April. Trips run on Wednesday, Friday and Sunday. Departures from Kuraburi are at 8.30am, returning at about 4pm.
The price is 4,900 baht per diver plus 700 baht national park fee. If you need to rent equipment that’s just 600 baht extra.