The topic of this paper is the Opatija tourist traffic analysis. The aim of the paper was to show how in the 20th and 21st century tourist traffic varied in the area of Opatija and the Opatija Riviera and to put these trends in the context of historical events in Opatija, but also in the national and regional space. Through the paper, the topic is presented and processed with the help of secondary data based on: historical facts and data, data on accommodation facilities, tourist attractions and indicators of tourist trends. By analyzing them and making tables with indicators of the fluctuation of tourist traffic, conclusions were reached about the trends in tourism in the area of Opatija. The tourist resource base of Opatija was analyzed and categorized through its geo-traffic position, natural resources, climatic conditions and cultural-historical heritage. It was shown why each of these factors is separately responsible for the development of this destination, creating a unique tourist product and/or service. Together they form and create a unique destination. It was also important to systematize the short history of tourism in Opatija and to cover as briefly as possible the historical context in which the tourist development took place. The division of the history of tourism was easiest to orient towards the war events, which had the greatest impact on tourist movements. Therefore, the tourism of this area divides it into the pre-war period, the period between the First and Second World War, the post-war period and the modern period starting from the independence of the Republic of Croatia. The paper presents the tourist offer of the City of Opatija, i.e. the development of accommodation capacities. In order for the paper to be properly concluded, a statistical analysis is included, which is the contribution of this paper. Data on tourist trends from 1899 until 2019 in the area of Opatija were statistically processed in order to monitor the fluctuation of tourist traffic and show changes in tourist traffic.