In its tourist offer Croatia provides distinctiveness of which other tourist destinations may only be envious. Regardless of the globalisation and availability of plenty of tourist locations, Croatia has been recognized for its coastline with many islands, unspoiled nature and various herbal and animal species. One of the most important roles in tourism has the nautical tourism, as a special type of tourism, which particularly emphasizes the strengths and the beauties of the Adriatic sea. In addition to the positive effects which nautical tourism brings, it is not possible to entirely avoid consequences of development and its negative impacts, but it is crucial to control and to prevent them. The County Šibensko-kninska, located in the heart of all natural beauties, is surrounded with the particularities of the coastline and the islands, and has chosen sustainable development as the direction of further development of the nautical tourism. The topic of this paper is the analysis of the manner of influence of the nautical tourism on the sea and the coastline of the County Šibensko-kninska as well as future perspectives of the sustainable development through measures of development and protection of the maritime environment. The goals of the paper were to describe the characteristics of the nautical tourism and it influence on the County Šibensko-kninska. The aim was also to present good and bad perspectives of the development of the nautical tourism and to propose manners of further development with the emphasis on the methods that need to be implemented in order to protect the sea and the coastline. Nautical sector is one of the safest types of tourism, which has been confirmed in the covid-19 pandemic, which surprised national and world economy. Nautical tourism is no longer a luxury, but the way of life. By understanding the motive, the needs and the importance of the nautical tourism the Republic of Croatia should use the opportunities that the market of nautical guests brings, but should not forget to preserve its particularities for which it is well known.