Casuarinas (Casuarina equisetifolia L.) are a problematic invasive plant within the Bahamas, but very little is known about its population dynamics or spread capabilities. This study monitored casuarinas beach populations on San Salvador Island, the Bahamas, over a 2.5 year period to provide basic background data on distribution patterns and degree of spatial variability over time. Casuarinas had a significant clustered distribution along beach transects (P< 0.05). Numerous gaps in between clusters, 20 m or longer, were not colonized during the duration of the study. These patterns occurred among beaches with differing levels of human visitation. It seems that beach populations of casuarinas had low spatial variability within the spatial and temporal context of this study. These results may help guide future research and may be an initial step in developing effective management strategies in the Bahamas and in other areas where it has invaded.