Development in tourism needs to be strategically defined, determined and monitored by the results of its management. In order to make the development of tourism as successful as possible, it is necessary to follow trends in the tourism market and establish such goals that accompany the tourism demand, as well as the long-term sustainability of tourism. The purpose of managing the development of tourism is to achieve the satisfaction of the environment, market participants and tourists participating in tourist flows. Tourism Development Management of the City of Opatija is based on synergy of all relevant organizations in tourism and supply holders that modernize tourist products and respond to the requirements of tourist demand. Since tourism is crucial for Opatija, seeks to raise the attractiveness of the destination to a higher level as well as the quality of service, which is supported by the tourist indicators and the number of highly categorized facilities. Looking at trends in loyal emitting markets for 2021, Austrian tourists in Opatija are expected to grow continuously, representing the largest emitter market for years. Investments in the education of professional staff, attractive tourist supply and continuous growth of the number of tourists are assumption for growth of tourists in the area of Opatija and further development of destination in accordance with the principles of sustainable development.