SEMRU, at NUI Galway, carried out a survey of overseas visitors to Ireland as part of the Marine Institute’s funded project “Valuing and understanding the dynamics of Ireland’s Ocean Economy” (PBA/SE/16/01). The purpose of the survey was to estimate what proportion of their total holiday expenditure was in coastal areas (coastal tourism) and what proportion was on undertaking marine related activities (marine tourism). The survey, which consisted of face-to-face interviews with 620 overseas visitors, also solicited information on spatial distribution of their different marine related activities and associated expenditure.