The ageing process has provoked a visible increase of older adult students in Brazilian universities. Several studies have been conducted on the development of this older adult student, but few have tested the influence of social skills and perceived social support on academic performance by comparing different age groups. The goal of this longitudinal study was to investigate the influence of social support and social skills on the academic performance of older adult college students compared to younger individuals. The sample was composed of 326 college students (200 younger individuals and 126 older adults), from 13 universities in the metropolitan area of the city of Rio de Janeiro. Multiple hierarchical regression confirmed the predictive power of the social support (but not the social skills) over academic performance. The evolution of academic performance (performance coefficient) was observed for two years. New studies with larger samples in other regional contexts are recommended.