You find the tourist office in the building of the ferry terminal on the city center side. They have a free city map which has the information in Polish/German/English. The sights are listed on the back.
The proper address of the tourist office is:
Tourist Information Center
ul. Wybrzeze Wladyslawa IV
(near the "Centrum" ferry port)
phone no. +48 91 322 49 99
Favorite thing: In Swinoujscie there is a large ferry terminal. Ferries to Ystad in Sweden , Copenhagen and Bornholm in Denmark start and finish their voyages through the Baltic Sea.