The present study investigates second language (L2) learners' pragmatic development during study abroad (SA) programs by focusing on the recognition of pragmatic routines, and how sociocultural adaptation and intensity of interaction influence pragmatic gains. It is a longitudinal investigation that employed a mixed-method approach. Thirty-one Brazilian students in their first semester of study in a US university completed a pretest and posttest version of a sociocultural adaptation questionnaire, a language contact survey, and a routine recognition test. Quantitative data were complemented with qualitative information from semi-structured interviews with 2 of the participants, who provided details about the nature of their adaptation experiences and the patterns of interaction they held during the sojourn. Findings revealed that the recognition of pragmatic routines significantly increased during a semester abroad, and that this development was influenced by both sociocultural adaptation and intensity of interaction, interaction being the main predictor of pragmatic gains. Results from this study emphasize the importance of SA programs for the acquisition of pragmatic routines, and suggest that learners' willingness to acculturate in the SA environment, and exposure to recurrent situations outside of the classroom are determinant aspects for routine recognition.