The United Nations (UN) General Assembly proclaimed the UN Decade of Ocean Science for Sustainable Development (2021-2030) in December 2017. Under the framework of the UN Decade, scientists and stakeholders from all relevant sectors convened in a series of workshops, including the North Atlantic Regional Workshop held in Halifax in early January. Over 150 participants from 14 different countries discussed various domestic and regional initiatives culminating in the identification of a wide range of actions, potential initiatives, programs and partnerships that would advance ocean knowledge for sustainable development. The Summary Report is available in English and French.