Journal of Social and Clinical Psychology 30(6): 599-615 The goal of this study was to clarify mixed findings regarding the association between dispositional social anxiety and drinking among college students by using a daily diary method to examine whether a within-person social-contextual event moderated the relationship between social anxiety and alcohol use. College students (n = 476) completed a measure of dispositional social anxiety and then for 30 days reported whether they experienced an embarrassing event in public and the amount of alcohol they drank each day. We examined whether experiencing an embarrassing event moderated the relationship between dispositional social anxiety and alcohol use for same-day, same-evening, next-day, and next-evening drinking. While there was a positive relationship between dispositional social anxiety and alcohol use on evenings when an embarrassing event occurred earlier that day, this appeared to be driven by a reduction in drinking among those low in social anxiety. Individuals with high social anxiety drank in the evening regardless of embarrassing event occurrence. Results suggest that people with low social anxiety show an adaptive response to embarrassing events by lowering drinking on such evenings, while those with high social anxiety may drink to reduce their already high levels of anxiety independent of daily social events.