Abstract Background Seasonal affective disorder (SAD) is a seasonally recurrent type of major depression that has detrimental effects on patients’ lives during winter. Little is known about how it affects patients during summer and about patients’ and physicians’ perspectives on preventive SAD treatment. The aim of our study was to explore how SAD patients experience summers, what type of preventive treatment patients implement, which preventive treatment methods, if any, physicians recommend, and what factors facilitate or hinder implementation/recommendation of SAD prevention. Methods We conducted 15 semi-structured interviews, ten with adult patients with a history of SAD and five with physicians. Transcripts were analyzed by two researc...