Erasmus+ study period abroad is an international exchange in which students study at one of the foreign universities while remaining enrolled at their home university. The aim was to examine the familiarity and determinants of motivation of high school graduates to study abroad and determine which student characteristics are related to their intention for participation. Online questionnaire, completed by 517 high school students, consisted of a section on familiarity and intention to go on study period abroad, a Multidimensional Motivations to Study Abroad Scale (MMSAS) by Aresi et al. (2017), Scale of Academic Self-Efficacy and Scale of Achievement Goals (Lončarić, 2014) and section on indicators of socioeconomic status and school achievement. Results indicate that students are partially acquainted with the study period abroad and the importance of all motivational factors. More than 50% of participants declared that they intend to go on study period abroad. The intention to participate is positively correlated to father's educational status, frequency of going abroad, grade point average, evaluation of knowledge and communication skills in English, academic self-efficacy, approaching learning goal and to all factors of MMSAS and negatively related to the avoidance of work goal. The regression model explained 36% of the variance of the intention to participate in study period abroad. Statistically significant predictors that contribute to the explanation are level of English language proficiency, academic self-efficacy, motivation to learn or improve foreign language skills, cross-cultural interest and getting away from home environment. Future research should focus on other variables that contribute to explaining the intention to participate in study period abroad.