Exactly the same runtime as the original: 121 minutes.
Gather your family, turn off the lights, turn up the volume, and prepare to set sail on one of the most terrifying and inspiring voyages ever captured on film—now in the language of your heart. In The Heart Of The Sea Tamil Dubbed
As of now, Netflix India does not hold the Tamil dubbed rights. Check Amazon Prime or Disney+ Hotstar. Exactly the same runtime as the original: 121 minutes
Physical DVD releases with Tamil audio are rare. Digital streaming is your best bet. turn off the lights