The aim of the article is to show how the hitherto important functions of small Polish ports and marinas are disappearing. This was done by analyzing the volume of cargo turnover, the number of international passengers and the gross tonnage (GT) of cutters. The analysis covers the years 1996-2018. It was found that the transhipments increased in Gdańsk, Gdynia and Świnoujście while decrease was observed in Szczecin and small ports. International passenger traffic (after a peak in 1997-2001 in some of them) is currently at a minimal level. Also after Poland’s accession into the European Union, the gross tonnage (GT) of the cutter fleet significantly decreased. Therefore, it is evident that Polish small seaports and marinas should look for new functions that may become their development factors in the future. Tourism, including yacht tourism, should become one of such functions.