Why do coastal regions experience moderate climate?
Coastal areas have moderate temperature because the land absorbs and radiates heat much faster than sea. So, during the day cool air from sea rush towards the land and during night cool air from the land rush towards sea.The specific heat capacity of water is very high. It is about five times as high as that of sand.Hence the heat energy required for the same rise in temperature by a certain mass of water will be nearly five times than that required by the same mass of sand.
Similarly, a certain mass of water will give out nearly five times more heat energy than that given by sand of the same mass for the same fall in temperature. As such, sand gets heated or cooled more rapidly as compared to water under the similar conditions. Thus a large difference in temperature is developed between the land and the sea due to which land and sea breezes are formed. These breezes make the climate near the sea shore moderate.