Why does the concrete around the swimming pool stay warmer than the pool water?

The concrete around the swimming pool tends to stay warmer than the pool water due to its thermal properties and heat retention capabilities. Concrete absorbs and retains heat from sunlight more effectively than water, which has a higher specific heat capacity and can cool down more quickly. Additionally, the shallow layer of water in the pool allows for faster heat loss through evaporation and convection, while the concrete remains insulated from these processes. As a result, the concrete can feel noticeably warmer, especially in sunny conditions.