The social-ecological systems of the Vietnamese Mekong Delta (VMD) are under stress driven by accelerating impacts of climate change, upstream hydropower development, and local flood management policies. These combined complexities have prompted the rural societies to make significant efforts to adapt to changing conditions. While local adaptation represents diverse patterns of communication and interactions across the social sectors, far less attention has been given to how these learning processes occur in the rural communities of practice. This paper attempts to delineate the learning dynamics in which farming households are key practitioners. The mixed methods approach that guides data collection includes focus group discussions, in-depth interviews with key informants and household surveys. The analysis suggests that social learning plays a significant role in facilitating the adoption and dissemination of experiential and experimental knowledge across geographical boundaries. This study highlights important aspects of households' social learning system characterized by informal networks with various forms of bonding and bridging relationships. These learning patterns suggest that informal communication is a dominant learning approach in the rural delta. This study contributes to advancing the theoretical and empirical knowledge of social learning and its policy implications for rural development in the VMD.