The most opportune time to experience the majestic Athirappilly Waterfalls, which is often referred to as the "Niagara Falls of India," is during the monsoon season, extending from June to September. During this period, the waterfalls are in their full glory as the rains feed the river, causing the cascades to swell and roar as they plunge down. The lush green surroundings are also at their best, having been rejuvenated by the monsoon showers. Visitors should be prepared for frequent rains and should pack accordingly, but the spectacle of the waterfalls during this time is truly unparalleled.
Those who prefer a less intense experience and are looking to avoid the heavy monsoons may consider visiting during the months of October to December, directly after the monsoon season. During this period, Athirappilly Waterfalls still carry a significant volume of water, providing a breathtaking sight without the monsoon complexities. It's an ideal time for tourists seeking to enjoy the waterfalls without the heavy rains, as well as for photographers aiming to capture the perfect shot of the cascades against the backdrop of the lush landscape. However, it should be noted that the flow of the waterfalls begins to diminish as the months progress, especially approaching winter.