How does a body of water regulate the temperature of a certain region country?

A body of water regulates the temperature of a region through its high specific heat capacity, which allows it to absorb and store heat more effectively than land. During the day, water absorbs heat, moderating temperatures and preventing extreme heat in nearby areas, while at night, it releases this stored heat, helping to keep temperatures warmer. This effect leads to milder climates, particularly in coastal regions, where temperature fluctuations are less pronounced compared to inland areas. Additionally, bodies of water can influence weather patterns and humidity levels, further impacting local temperatures.