To better address the impacts from climate change, OECD countries are increasingly making climate change adaptation a policy priority. Assessing progress in the implementation of national adaptation policies is a critical step in understanding how adaptation efforts contribute to strengthening climate resilience, and whether they are effective. Experience in policy design and implementation has grown significantly, however measuring progress remains a challenge for countries. Building on a cross-country survey and country case studies carried out in Chile, Korea, the Slovak Republic and the United Kingdom, this report provides insights into current OECD country practices in measuring climate adaptation. It proposes a framework that can guide countries on what needs to be measured and how, and discusses the role that adaptation indicators and a conducive institutional environment can play in strengthening adaptation measurement.