In coastal regions during the day the air above the land gets heated faster and starts rising. As this air rises, a region of low pressure is created and air over the sea moves into this area of low pressure. The movement of air from one to other creates winds. During the day the direction of the wind would be from the sea to the land. During night, since soil cools faster than water, the air above the land is cooler than the air above the sea. Now, the air moving from the high pressure area over land to the low pressure area over the sea creates land breeze.
