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We examined whether the overall score as well as sub\u2010domains of the seasonal pattern assessment questionnaire can predict seasonal changes in mood, sleep, appetite, weight, and physical activity in a one\u2010year prospective study. In a sample of 336 Icelandic residents, we administered an online questionnaire once in each season, including the seasonal pattern assessment questionnaire, the depression, anxiety, and stress scale, the Questionnaire on Cravings for Sweet or Rich Foods, the Bergen Insomnia scale, the International Physical Activity Questionnaire, and surveyed body height and weight. We compared participants with at least moderate seasonal changes to a control group of participants without seasonal changes. Only food cravings and physical activity showed seasonal fluctuations. In none of the domains were the seasonal fluctuations predictable by summer\u2010time self\u2010reported seasonal symptoms, neither in terms of general seasonal changes nor in the specific domain. While the overall low rate of seasonal changes limits conclusions, this study adds to the literature that raises doubts about the concept of the predictability of seasonal changes by self\u2010reports.<\/jats:p>","DOI":"10.1111\/sjop.70016","type":"journal-article","created":{"date-parts":[[2025,8,20]],"date-time":"2025-08-20T10:17:29Z","timestamp":1755685049000},"page":"86-99","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Can Self\u2010Reported Seasonality Predict Prospectively Assessed Seasonal Changes of Self\u2010Reported Mood, Food Cravings, Body Weight, Insomnia, and Physical Activity?"],"prefix":"10.1111","volume":"67","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3927-7192","authenticated-orcid":false,"given":"Jonas","family":"Potthoff","sequence":"first","affiliation":[{"name":"Institute of Psychology University of Graz  Graz 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