The Acclimatize operation will close the knowledge gap in relation to the faecal pollution of 'at-risk' urban and rural bathing waters in Ireland and Wales by identifying and quantifying pollution streams and determining their impact on these waters through a dynamic period of climate change. The project will develop a range of practical management methods, including smart real‐time predictive tools, to improve the quality of such coastal waters to ensure compliance with regulations to protect human health and the marine environment. Data models will be developed to inform the effects of climate change, through altered weather patterns, including rainfall, temperature and tides which impact the quality of water in coastal areas. The Acclimatize project will focus on designated and ‘at-risk’ bathing waters in two complementary environments, a large scale urban and a rural agricultural environment.