Is this for a or a specific anniversary (Srardham) ?

In Chennai, Pithru Tharpanam (the ritual of offering oblations to ancestors) is traditionally performed at sacred water bodies, specifically sea shores and temple tanks. Devotees often gather at these locations during auspicious times like (New Moon), particularly Thai Amavasai Aadi Amavasai , to pay homage to their forefathers. Top Places for Pithru Tharpanam in Chennai Mylapore - Google Arts & Culture

If you prefer a quiet, non-urban setting, drive 15 km south of Chennai to Kovalam.

Before heading to these locations, ensure you are prepared:

During Mahalaya Paksha (16-day pitru period in Sep-Oct), temporary tarpanam arrangements are made at:

For those unable to travel to the outskirts of Chennai, the famous "Ashtalakshmi Temple road" temple in Besant Nagar is a convenient and powerful option.