London Climate Action Week harnesses the unique power of London for global and local climate action. It mobilises London’s unparalleled ecosystem of climate and non-climate organisations to accelerate global climate action and supports action in London to ensure it acts as a global climate leader.

LCAW 2025 will take place 21-29 June 2025.  Now in its 7th year, it is the largest city-wide climate festival in Europe, attracting over 45,000 people annually.   LCAW provides a brand and platform under which hundreds of stakeholders host their events, creating a large and vibrant programme of climate-focused activities.  The event registration process for the upcoming edition will open in early 2025.