This study discusses the results of research into changes in the tourist traffic in port cities, which may pose challenges to the planning of city logistics. The analysis draws on the statistical data on tourism. The study sample
includes four cities located in Poland’s two coastal areas at the Baltic Sea: Szczecin and Świnoujście (West
Pomeranian region), and Gdańsk and Gdynia (Pomeranian region). Covering the years 1995–2022, the analysis
has been complemented with a review of the literature on the role of city logistics in solving problems caused
by the development of tourism. The rapid growth of tourism generates an increased flow of people, goods,
and information, which may be detrimental to the smooth functioning of a city. Insights into the development
of tourist traffic over the years may facilitate the planning of city logistics and reconcile the function of a tourist
destination with that of a port, which the cities have to perform. It may also support efforts that aim to ensure
the sustainable development of port cities.