The story of origin of tides or waves in sea as per Hinduism is associated with Sage Aurva. The story is found in the Vamana Purana.
Legend has it that Sage Aurava, performed intense meditation, or Tapas, for several years. The intense austerities and rigours penance of the Sage resulted in the creation of Vadavagni – a scared fire.
Brahma entrusted Saraswati River with the sacred task of depositing the Vadavagni in the sea.
The sacrificial fire of Sage Aurava was deposited in the sea by Saraswati River. Here it took the form of a horse and lives forever. Regular exhalations of the horse result in waves, or tides, in the sea.