Cultural tourism is a significant segment of world tourism and it's predicted that the demand for cultural tourism in the world, including in Croatia, will continue to grow. A long-standing and still present problem of tourism in Croatia is a highly pronounced seasonality. This paper concludes that Croatia is still too focused on leisure and tourism industry on the seaside and that other forms of tourism, that are not influenced by seasonality, are missing. One of the specific forms of tourism, that is seasonally insensitive, is cultural tourism and the city of Rijeka is a positive example of how cultural tourism can prolong the tourist season. Namely, it was found that the tourism seasonality in Rijeka is much less pronounced than at the level of the whole Croatia. One of the reasons for this, is the numerous diverse events that take place in Rijeka during almost all months of the year. Therefore, encouraging cultural events in the pre- and post-season have proven to be a good tool for reducing seasonality and thus for the development of tourism at the limit of capacity. As cultural tourism cannot develop by itself, the paper concludes that cultural tourism in Rijeka can be an additional content to nautical tourism, given that nautical tourists show greater interest in participating in cultural activities than other tourists. By introducing the offer of cultural tourism in nautical tourism services, the season of nautical tourism and the stay of nautical tourists can be prolonged. Also, cultural facilities can be included in the offer of other forms of tourism and can also be offered to tourists in the nearby areas of Kvarner. With the further development of cultural tourism in Rijeka, multiple benefits can be achieved, such as prolonging the tourist season, increasing tourist traffic, the image of the city of Rijeka, and also the whole of Croatia.