Seasonality is one of the characteristics of tourism in many countries, especially in the Mediterranean. The majority of tourist traffic is realized in the summer months, which creates various consequences for destinations, from heavy loads on the infrastructure to the need for additional seasonal workers and others. For this reason, tourism planning is increasingly thinking about how to extend the season beyond the summer months and which tourist products can contribute to this. This paper deals with the problem of seasonality in Istria, a region where a lot of investment has been made in recent years to extend the season, although it is still present. The research carried out in Rovinj, Pula and Bale was carried out during the COVID-19 pandemic and showed additional problems in tourist traffic that caused a health crisis and a slow recovery. He also pointed to the general problem of seasonality. Namely, the tourist offer is still not sufficiently developed, which would enable the increase of the number of tourists in the autumn, spring and winter months to the desired level. It is about the lack of sports fields such as golf courses, a sufficient number of gastronomic events, but also accommodation capacities that are equipped for the winter period, especially when it comes to private accommodation. The goal of all stakeholders is to extend the main tourist season, and considering that year-round marketing campaigns should be developed, the development of quality content that can be the reason for the arrival of new guests to the destination in the off-season. The research also showed that it is necessary to strengthen cooperation between the private and public sectors, that is, that their stronger connection could contribute to faster development of content and the extension of the season.