A lower percentage of beach boys reported regular partners in the past 12 months (52.3%) compared to casual partners (95.4%). Approximately 49.6% of the participants were married, while 45.7% were single and 4.7% divorced, separated or widowed. Eligibility criteria included men who cruise in and around beach areas and who had anal and/or vaginal sex with female or male tourists in the 12 months before the survey. In 2018 we carried out a respondent-driven sampling (RDS) survey among beach boys in Galle, Sri Lanka, to determine prevalence of HIV and other infections, HIV risk behaviours and utilisation of HIV prevention services. There are limited data globally on HIV in men who engage in casual and transactional sex with female tourists.