<p>Climate Service Organizations (CSOs) are designed to build resilience through the development and support of actionable climate adaptation strategies. CSOs bridge the gap between science and decision making by providing decision-relevant information and connecting scientists with stakeholders. Evaluating CSO effectiveness, or reaching intended objectives, is essential to ensure they support long-term climate resilience. This essay presents a framework for assessing CSO effectiveness that integrates qualitative and quantitative metrics into existing workstreams to evaluate impacts, or the broader, long term changes resulting from effective CSO, such as instrumental impacts (changes to plans, decisions, practices, or policies), conceptual impacts (changes in knowledge or awareness), connectivity impacts (strengthened relationships, partnerships, or networks), and capacity building impacts (enhancing skills, expertise, or resources of an organization or group). Socio-environmental impacts such as improvements in ecosystem structure and function, human well-being, or new markets, typically fall outside CSOs’ scope. Thus, CSOs should avoid setting goals for socio-environmental impacts and instead partner with organizations focused on long-term measurement of such outcomes. Evaluating practices at the USDA Southwest Climate Hub as an example, we offer recommendations for improving intentional evaluation to extend the reach and effectiveness of CSO programs. Our findings provide valuable insights for researchers and practitioners working to enhance the impact of climate adaptation efforts through science-informed networks.</p>