Get an Opal Card for Transport
Buy an Opal card at Sydney Airport newsagent, train station, or convenience store (costs SGD 5-10 with credit included). It works on all trains, ferries, buses, and light rail across Sydney. Tap on entry and exit. A daily cap applies (around AUD 17.80 weekdays), so unlimited travel after 8 journeys costs no more than the cap. Contactless debit cards and Apple Pay also work on readers. Kids under 4 ride free, kids 4-15 get 50% discount. Refill at any station or convenience store. Ferries are often faster than buses for scenic routes.