Small island developing states and small tourism-dependent coastal states have been the most gravely impacted by global climate and Coronavirus disease 2019 (COVID-19) pandemic crises and are expected to face even greater economic and social challenges in the years to come. While information and research on sustainable and blue tourism in small island developing states (SIDS) does exist, it is hard to find, difficult to analyze, and challenging to turn into policy guidance. This guidance note is a synthesis of findings from a literature review of the inventory of blue tourism resources, consumer market research, and tourism trend monitoring undertaken by the World Bank global tourism team since the start of COVID-19.