Western Australian marine ecosystems and dependent industries such as fisheries have endured prolonged, extremely warm water events (marine heatwaves) that are projected to increase in frequency and duration with future ocean warming. Over the past decade, marine heatwaves of global significance have had substantial ecological and economic impacts along the Western Australian coastline. This project’s overall objective is to develop an advanced understanding and predictive tools to accurately forecast extreme temperature events and their impact on marine ecosystems along Western Australia, to empower management agencies and other stakeholders with the knowledge and tools to develop effective responses.