The research sought to assess the effects of climate change and anthropogenic activities on marine tourism in Sharm El-Sheikh, as perceived by diving instructors and marine sports professionals. We used quantitative techniques to collect data through a questionnaire, aiming to meet the research objectives and assess its hypotheses. The research sample included 87 professional diving instructors and marine sports activity facilitators in Sharm El-Sheikh. The sample was intentionally chosen to fulfill the research goals. The research revealed that the marine ecology of Sharm El-Sheikh was severely adversely impacted by rising temperatures owing to consecutive climate changes. The elevated levels and prevalence of acid rain at Sharm El-Sheikh significantly disrupt the marine ecosystem, adversely affecting different water sports activities, including diving, snorkeling, and other marine pursuits. Following the findings of the field study, a series of recommendations were formulated, the most critical of which is the necessity to adopt sustainable practices to mitigate the effects of increasing temperatures due to ongoing climate changes, thereby safeguarding the marine ecosystem in Sharm El-Sheikh.