7th arr, Port de la Bourdonnais
Tours last approx. 1hr. April to October every 30 min from 10:00 AM to 10:30 PM.
October to March from 10:00 AM to 10:00 PM. More details here with Seine river cruise ticketing.

the seine pariq

the seine

bateaux parisiens

bateaux paris

Other online ressources: Bateaux Parisiens, Bateaux Mouches, Vedettes de Paris