Waterbuses to Pihlajasaari depart from Merisatama and Ruoholahti. Merisatama pier is situated to the west from Kaivopuisto, next to Cafe Carusel. Ruoholahti pier is to the west from restaurant Faro, only 350 meters from Ruoholahti metro station.

Check Pihlajasaari waterbus service timetables and ticket prices on JT-Line website. Island transportation is also included in Journey planner of Helsinki Region Transport.

Pihlajasaari also has a harbour for private boats.