Energy and environmental issues are nowadays becoming more prominent, and business subjects in tourism should dedicate more effort to energy management. This can lead to a reduction in energy-related expenses, and it shows social responsibility and concern for the environment. In order to determine the informedness of managers in tourism concerning energy issues, empirical research was conducted in all seven counties of Adriatic Croatia. The questionnaire was filled out by 254 managers in tourism in such a way that the research covered business management (hotel, villa, camp, and apartment managers), managers in tourist boards, managers in units of local self-government, and managers among other stakeholders directly or indirectly involved in tourism. The questionnaire consisted of closed-ended questions answered using the Likert scale with 1 being the worst and 5 the best. The questionnaire’s reliability was tested using factor analysis and internal consistency analysis. The results showed that managers still have insufficient knowledge concerning the impact of energy and its link to tourism. Additionally, 66.4% of the participants considered their knowledge regarding energy issues in tourism to be poor or negligible. It can be concluded that continued education for managers is required as higher awareness leads to “greener” attitudes among managers in tourism.