Strategic management practices influence the effectiveness of organizations’ strategic initiatives. Due to the increase in climatic change over the years, the government, Non Governmental Organizations, and other actors have been strategizing on ways and means of managing climate change, including implementation of climate change adaptation projects countrywide. Despite all these interventions, there has been little success of the intended goals. The country is still ravaging from the negative impacts of climate change. The purpose of this study was to assess strategy implementation on the performance of climate change adaptation projects in Kenya and this formed the general objective of this study. The study adopted mixed research design using both quantitative and qualitative approaches. Both descriptive and analytical methods were applied for the quantitative approach. The study was anchored on Institutional Theory, Resource Based View, Stakeholder Theory, Path Dependency Theory, Theory of Change and Theory of Constraints. The target population was 2,021 individuals. The study used simple random sampling technique using Slovin’s Formula to derive a sample size of 334 respondents. Data was collected using interviews, questionnaires and observations of the project sites. Statistical Package for Social Sciences (SPSS) version 21, and Microsoft Excel were used for data analysis. Descriptive statistics used mean and standard deviation to describe the data characteristics. Correlation and regression analysis were used in testing the effects of the variables on project performance. Data was presented in graphs, charts, tables and regression models. Findings indicated that the constructs, viz Institutional Characteristics, Resource Management, Stakeholder Participation and Regulatory Framework were all significant and had positive impact on the performance of climate change adaptation projects. When moderated with Climate Change Factors and Effects, the model improved, indicating that it influenced the effect of strategy implementation on the performance of climate change adaptation projects. The study recommended adoption of sound institutional characteristics such as democratic and coaching leadership style, functional project implementation structure and use of convenient and affordable communication technology. The study recommended effective management of resources to ensure appropriate allocation, adequacy and resource optimization. Stakeholder involvement in decision making, building their capacity to impart necessary knowledge and skills, and an understanding of community culture was recommended by the study. The study recommended alignment of the projects to required government policies, establishment of community agreements and adherence to donor stipulations. Utilization of indigenous knowledge in project implementation and implementation of projects that can withstand climate change effects was recommended. Further studies on other factors of strategy implementation are recommended by this study. In addition, Phase 1 to 3 of ASAL regions in Kennya, as categorized by IPC classification, can be studied to establish the performance of climate change adaptation projects implemented.