Arungam Bay: East Coast Surf Tour While the moonsoon is lashing the west coast, the endless beaches on the opposite side of the island stretch out under the blazing sun. From May to October the best surfing in Sri Lanka is found in Arungam Bay near the town of Pottuvil on the southern tip of the east coast. Mambo Surf Tours will take you to: Arungam Bay Pottuvil Point Crocodile Rock Temperatures in Arungam Bay Photo: Jens Wendroth ©