
Overview
Aadi Perukku — also called Padinettam Perukku — is a Tamil monsoon festival celebrated on the 18th day of the Tamil month Aadi (mid-August). It honours the swelling River Kaveri at the peak of the south-west monsoon, whose floodwaters bring life to the rice-fields of the delta.
Significance
Water is sacred in Tamil culture — and the Kaveri is its mother-river. Aadi Perukku celebrates the river's bounty as the monsoon fills its course. The festival is observed primarily by women, who offer prayers, food, and floating lamps to the Kaveri for the prosperity of their families.
The Story Behind the Festival
Tamil tradition holds that Saint Agastya brought the Kaveri to South India from his kamandalam (water pot) at the request of Lord Vinayaka. The river is therefore considered an incarnation of the goddess Lopamudra, Agastya's wife. On Aadi Perukku, the Kaveri is at her fullest — and the gratitude of generations of farmers and women is offered back to her on this day.
Rituals & Observances
- Women bathe in the Kaveri or other rivers at dawn.
- Sweet rice (sakkarai pongal), curd rice, lemon rice, and tamarind rice are prepared and offered to the river.
- Floating lamps (deepams) are released onto the river at dusk.
- Coconuts, flowers, and turmeric are offered.
- Newly-wed couples often visit family on this day, exchanging gifts as a symbol of fertility and abundance.
When & Where
For Devotees
If you live near the Kaveri or any major river, visit the riverbank at dawn or dusk. Prepare a small offering of cooked rice or sweets. The festival can be observed at home by placing water-filled brass pots near the puja shelf and lighting lamps.

