This paper provides the first assessment of the landscape of public international funding for nature-based solutions for climate adaptation, covering both climate finance and Official Development Assistance (ODA). It seeks to help donor countries, multilateral institutions, and developing countries better understand the current state of funding, and provides recommendations to address barriers that are hindering public donor funding support for nature-based solutions for adaptation. The Global Commission on Adaptation's 2019 flagship report Adapt Now: A Global Call for Leadership on Climate Resilience identified access to finance as one of three key barriers that impede the scaling up of nature-based solutions for adaptation in many countries. This paper shows that the amount of public international funding flowing to nature-based solutions (NbS) for adaptation in developing countries is still relatively small. This paper was produced by World Resources Institute and Climate Finance Advisors in support of the Global Commission on Adaptation.