ayamkulam Kayal, Kayamkulam Lake or Kayamkulam Estuary is a shallow brackish water lagoon streaching between Panmana and Karthikapally. It has an outlet to the Arabian sea at Kayamkulam barrage.[4] The Kayal used to be connected to the sea most of the time except during dry season when a bar like formation separates it from the sea.[5] Now the bar has been opened up permanently for construction of Kayamkulam Fishing Harbor.[6] Kayamkulam boat race is conducted in Kayamkulam Kayal.There is a popular belief that Kayamkulam kayal was once lush green fields and Kayamkulam Raja, angry and desolate from being defeated by Travancore King Marthanda Varma, ordered his naval officers, Arattupuzha Arayars, to rupture the barrier separating it from the sea and let salt water in to make the fields un-cultivable.The Kayal area has wet and maritime tropical climate influenced by the seasonal heavy rains. It receives more than 2000 mm of rain annually more than 70% of which come from the southwest summer monsoon and the rest from northeast winter monsoon . Annual mean temperature minimum and maximum are around 25 °C (77 °F) and 30 °C (86 °F). Humidity is higher in mornings than in afternoons.