Ao Kiew Na Nok is a small bay at the southern tip of Koh Samet island in Rayong Province. Facing southeast, it catches wind from the northeast monsoon season (November to March). The bay is one of the quieter spots on the island.

Suited for intermediate riders. The bay is small with limited riding area but offers clear water and a sandy bottom. Less crowded than the northern beaches. Some rocks near the headlands require caution. Access is via a dirt road from the main island road.