Athirappilly Falls is located in Athirappilly Panchayat which is in the Thrissur district of Kerala. It is located on the southwestern coast of India and on the Chalakudy River which flows towards the west. The river is situated near the Sholayar ranges and the Vazhachal Forests Division.
The Chalakudy River is almost 145 kms long and its source is in the Anamudi Mountains which is located in the Western Ghats. This river flows through the Vazhachal forest and keeps on flowing towards the Arabian Sea. Normally the flow of the river is smooth but when it reaches Athirappilly it becomes turbulent.
The best time to visit Athirapally falls is just after the monsoon season, September onward, when the waterfalls would still be in full motion.