ABSTRACT Characterized by limited access to basic services, slums are particularly vulnerable to the impacts of climate change. The Integrated Water Resources Management (IWRM) approach plays a vital role in addressing these challenges by improving urban resilience. This paper discusses the implementation of the IWRM approach with a climate-change adaptation (CCA) outlook on riverside slum upgrading in Indonesia using the qualitative methodology and a case-study approach. These implementations are analyzed in two layers, at the river-basin and the kampung level. The study found that a multilayered continuation of policy is required to plan the whole-basin water resources management, while the practices at the kampung level require scaling down and contextualization for specific locations. The involvement of multisector stakeholders collaborating with communities at different levels and secured land-tenure status are crucial for success. Different strategies linking water resources management in urban riverside slums with prioritization in addressing hazard control above other pillars of IWRM are a prerequisite for a safe settlement. The paper also highlights the need for more effective implementation, the importance of bridging the gaps between policy orientation and management, and implementations at all levels to ensure success.