ObjectivesTo investigate the awareness and use of health promotion offers among offshore wind workers and to study associations with demographic and workplace characteristics. To examine employees’ reasons for (non-)participation and their wishes for health promotion activities offshore.DesignMixed-methods study presenting the results from semistructured telephone interviews and a web-based cross-sectional survey.SettingOffshore wind parks in the German exclusive economic zone in the North and Baltic Seas.Participants21 offshore workers in the qualitative study (19 male/2 female; all German). 303 offshore workers in the quantitative study (287 male/13 female; 275 German/24 other nationalities).Outcome measuresAwareness and use of workplace health promotion offers and associations with demographic and workplace characteristics (age, work schedule and wind park phase); reasons for (non-)participation; needs and wishes for health promotion offers.ResultsFew workers indicated being aware of health promotion programmes at their workplace. Single offers were reported, with fitness facilities being the most common offer employees recognised and had used (n=168, 55.6%). Employees with a regular work schedule were more likely to have used fitness facilities offshore (adjusted OR (AOR)=3.22, 95% CI 1.53 to 6.80). Workers in the construction phase were more likely to have used massages (AOR=8.19, 95% CI 2.82 to 23.77). Younger workers were less likely to belong to the group of those who were aware of fitness facilities but had not used them (AOR=0.43, 95% CI 0.19 to 0.98). Employees expressed various needs and wishes for behavioural and environmental preventive measures offshore.ConclusionsThe results demonstrate a perceived need among the workers for the development of health promotion programmes offshore. Since the awareness and use of offers may partly depend on personal and organisational characteristics, this should be taken into account in the planning of health promotion activities.