Aim This study aims to describe the perceptions of young adults’, parents of young adults’ and health care professionals’ (HCPs) of the transition process for young adults with Type 1 Diabetes in the West of Ireland. Methods Thematic analysis of semi-structured interviews conducted with the three stakeholder groups was performed. Results Young adults hardly noticed the transition, with many of them seeing it as a physical move, whereas parents were more anxious and felt their involvement was still needed but not accommodated. Both groups perceived the young adults’ ability to manage their diabetes as a facilitator, as well as the continuity of care provided by the diabetes nurse. Resource limitations and an inability of a young adult to self-manage were identified as barriers to smooth transition by parents, whilst HCPs were experiencing problems with non-attendance and a lack of a psychology service. Conclusion This study highlights the importance of encouraging adolescents’ autonomy in the years leading to transition. A key healthcare professional link between both services appears to facilitate smooth transition. Being flexible and supportive of both parents and adolescents including the provision of mental health services are other important considerations.