The ferry line Venice to Pula only operates during the summer period, in July and August there are up to 7 weekly departures, the catamaran trip from Italy to Croatia takes about 3.5 hours, the departure time from Venice is about 5 pm (17:00). The catamaran departs from the international pier close to where the Cruise ships are docked, there are signs directing you to the port, the street name is Direzione Porto Marittimo.
If you arrive in Venice at Stazione di Venezia Santa Lucia, the Bus station Venice Tronchetto or Piazzale Roma you have in all 3 cases less than one km of walk to get to the catamaran. From Venice old town, you can take a water taxi to the port.
A one way or return ticket for the catamaran includes a check-in suitcase and a piece of hand-luggage up to 10 kg of weight. You can bring a bicycle on some of the departures, but space is limited, so make sure to book early to secure a spot for your bike.
Important: Keep in mind that you will have to pass through passport control and custom before boarding the boat, so make sure to bring all necessary documents and be there in good time.
Ticket price for a one way transfer with the catamaran is around 70 Euro, but usually the companies run campaigns where you can get cheaper tickets. As an alternative to the ferry it is possible to take a bus from Venice to Pula, during summer there is usually several daily bus departures