You must register Yourself in paldiski city office to go to Pakri Islands, then You must find transportation (boat). The best way to discover the beautiful islands is to ask from North Harbor. There are no official transport to islands but You can find a boat and sailor who can take You to island for about some hondreds of Estonian kroons.
Paldiski is a terminus of a suburban electric train service from Tallinn. There are about seven trains a day and the return fare was 25 EEK. The journey is quite interesting. The railway line passes through the leafy middle class Tallinn suburb of Nomme. Later what is apparently the only golf course in Estonia can be seen. The most scenic stretch of the line is in the last couple of minutes when the sea comes into view.
By train from Tallinn Baltic Railway Station. Direction: Paldiski (end point). Trains go several times a day. Or by car: out the Tallinn by Paldiski Road, about 40 minutes to go. It's new road cover near Paldiski You can drive safely now.
There is good train connection between Tallinn and Paldiski. Therefor this is perfect daytrip with picnic destination from Tallinn. It takes approx. 1h15min to Paldiski.
The fast boat trip from Helsinki to Tallinn takes only 1.5H unless you have your own or rented submarine,lol!
The electric train from Tallinn's Balti Jaam station is the way to go here. You arrive at the wooden Paldiski station building.