Background: Aquatics is an under-researched but possibly appropriate form of activity for people with severe to profound intellectual disabilities (SPIDs). Aim: The current pilot study investigates the suitability of an aquatics programme for service users with SPIDs. Method: Four service users with SPID completed an 8-12-session aquatics programme. Front-line staff (N = 6) were interviewed after the programme to explore its suitability. A thematic analysis of the interviews was utilized. Results: The thematic analysis unearthed main themes of effects, facilitators, barriers, strengths and needs. Conclusion: Aquatics can be an appropriate and beneficial form of physical activity for people with SPIDs, but there are many barriers to participation. Tailored programmes are required. Further investigation of the experiences of people with SPIDs in relation to physical activity is recommended.