The topic of my undergraduate thesis is sea currents in the Adriatic Sea. My thesis consists of three parts: Sea currents, Measuring sea currents and Sea currents of the Adriatic Sea. The goal of this papar is to point to the sea currents which are present in the Adriatic Sea, their importance, their characteristics and resulting effects. The first chapter, which consits of four subsections, includes basic features, importance and classification of sea currents. The second chapter describes procedures in measuring sea currents, gauges, their classification and the way they work ,which is very important for the better knowledge and determination of circulation and impact of currents. The most known and the most frequent gauges are shallow and deep buoyant ocean floats, Doppler - sonar system and electric current meters. The third chapter covers sea currents of the Adriatic Sea. This chapter has three subsections which talk about the Adriatic Sea composition (for example which types of the sea there are), about circulation influenced by seasons, and measurements of the sea currents in the Adriatic Sea.