In summer, Wannsee serves as the Berlin terminal for DB AutoZug car carrying trains to and from southern Europe.

Between the fall of Berlin Wall and 1 April 1992, Potsdam was connected through the fastest way via Griebnitzsee to interchange at Wannsee, besides transit traffic.

Line S7 passes through Wannsee on its route to Potsdam Hbf, and operates to and from central Berlin via the Stadtbahn.

These include Berlin routes 114 (to Krankenhaus Heckeshorn), 118 (to Rathaus Zehlendorf and Steinstücken), 218 (to Theodor-Heuss-Platz U-Bahn station and the Pfaueninsel), 316 (to the Glienicker Brücke in Potsdam) and 318 (to the Hahn-Meitner-Institut).

[3] Berlin ferry line F10 departs from a terminal some 200 metres (660 ft) from the station entrance, providing a crossing to Alt-Kladow on the other side of the Großer Wannsee lake.