This thesis describes the oceanographic characteristics of the Adriatic Sea using the results of operational numerical models. The analyzed meteorological and hydrographic data characterize the summer of 2017 as extremely warm and in most parts of the Adriatic as extremely dry. These weather conditions resulted in high values of sea temperature and record high values of surface salinity. The aim of the study was to analyze various physical and biogeochemical parameters during July, August and September 2017.The horizontal and vertical distributions of selected parameters of the Copernicus hydrodynamic and biogeochemical model were analyzed. The horizontal fields of oceanographic parameters were analyzed at 1, 50 and 100 m for a given period, while the vertical distributions were shown at points in the northern (13°E, 44.5°N), middle (16°E, 42.5°N) and southern (18°E, 41.5°N) Adriatic Sea. The results of both models are consistent with the long-term measurements of the majority of analyzed parameters. The NEMO model reproduced the measured extreme values of surface temperatures and salinity, as well as the inverse salinity profile recorded by the measurements. The BMF model reproduces subsurface maxima in the fields of dissolved oxygen, primary production, chlorophyll concentration and phytoplankton biomass, which is a well-known feature of the listed parameters in the Adriatic during the summer season.