Insomnia and insomnia symptoms are frequent experiences of autistic people resulting in pronounced daytime effects and poor quality of life. This study employed an Interpretive Phenomenological Analysis approach to explore lived experiences of autistic adults with insomnia, perspectives on current available interventions and future treatment preferences. Twelve participants (aged 21–48 years old) were interviewed following screening for insomnia, using the Sleep Condition Indicator (scores ranged from 1 to 12; cut off >16). Each interview was analysed individually developing Personal Experiential Themes for each case, which were then mapped across cases based on identified patterns and connections. Results yielded rich personal accounts and identified two Group Experiential Themes: “The Night is Friendlier” and “It Doesn't Really Work for Me”. Participants described experiences with sleeplessness throughout their adult lives and often since childhood. They discussed how the night time offers them a more relaxed and safe space to freely behave as they wish. Advice and interventions were viewed by participants via the prism of underlying social issues, such as autism acceptance and trust, and how these structures can affect participants' experiences with insomnia, help seeking and effectiveness of current interventions. Our results highlight the need for inclusion of autistic people in insomnia research through co-production and co-creation as well as clinical practice and delivery. This is the first study to integrate perspectives and experiences of autistic people towards insomnia and sleep-related advice by health care professionals. Findings are discussed in relation to theoretical and practical implications, as well as directions for future research.