This study examined consumer food waste behaviour using a comprehensive model integrating the theory ofplanned behaviour (TPB), the theory of interpersonal behaviour, and the comprehensive model of environmentalbehaviour. Using a temporally lagged design, one hundred and seventy-two respondents answered four ques-tionnaires over a period of 14 months. Questionnaires measured emotions in relation to food waste, habits, theTPB variables, intention to reduce food waste, and self-reported food waste behaviour. Results showed that theless well-studied variables of habits and emotions were important determinants of participants’ intentions toreduce food waste and their current food waste behaviour. As expected, we found that negative emotions wereassociated with greater intentions to reduce food waste, but contrary to our predictions they were also associatedwith higher levels of food waste behaviour. In other words, participants who experienced more negative emotionwhen thinking about food waste intended to reduce their waste but actually ended up wasting more food. Resultsalso show that participants with a greater sense of control, and more normative support for reducing food wastealso had stronger intentions to engage in the behaviour. Our findings extend existing understanding and un-derscore the importance of the non-cognitive determinants of behaviour, namely emotions and habits. Theimplications for research and practice are discussed.