Abstract Aim Sleep is an essential part of recovery post-operatively and poor sleep quality has been linked to increased patient pain, increased rates of post-operative complications such as delirium and to longer hospital stays. It is widely accepted that adults need at least seven hours of sleep at night. Surgery can induce a degree of insomnia and thus we sought to identify quality of sleep on a postoperative general surgical ward and to identify common barriers to sleep and reasons patients experience interruptions to sleep. Methods Using patient questionnaires, we investigated quality of sleep and explored factors, both intrinsic and extrinsic, which influenced patients both falling asleep and being woken throughout the night. Results Average age of participants was 73yrs. Average length of sleep was only 5.4 hours. 89% patients reported having sleep interrupted throughout the night and on average patients were awoken 2.4 times throughout the night. Only 11% reported feeling refreshed in the morning after sleep. Noise and pain were the most common barriers identified to falling asleep affecting 73% of patients. The predominant reasons for being awoken from sleep were noise (94%), interruptions for observations/bloods (67%) and thirst (33%). Conclusions This study has identified a high prevalence of poor sleep quality in postoperative surgical patients. Common factors influencing this are noise, pain and interruptions by medical staff. Many of these can be addressed through simple interventions to promote better recovery of patients by recognising and supporting the need for high quality sleep.