Society is only now grasping the full extent to which our lives, jobs and environment are sensitive to a changing climate. Effective decision making will be needed in many areas if we are to build a climate resilient future. Many more people will need to make use of climate knowledge in the future to support them in making their decisions. This manifesto was developed through a collaborative process involving people connected to the CKB Group. It explains that users of climate-related knowledge require access to information that is tailored to a myriad of specific circumstances, and the essential role climate knowledge brokers play in delivering this. It is only through collaboration that climate knowledge brokers will meet this complexity of user needs effectively. In The Climate Knowledge Brokers Manifesto we describe our vision of a world in which people make climate sensitive decisions fully informed by the best available climate knowledge, and how that can happen.