2021 is a key moment of opportunity for UK maritime security. The publication of the government’s Integrated Review in March is being followed by a systematic ‘refresh’ of the UK’s 2014 National Strategy for Maritime Security. In this article, Christian Bueger, Timothy Edmunds and Scott Edwards examine the role and significance of this strategy refresh, consider key priority issues for enhancing maritime security, and reflect on the challenges and opportunities that policymakers will face turning strategy into action. They conclude by arguing that getting maritime security right will be critical to delivering on the UK’s ambitions in security and foreign policy more widely.