Explanation:

During the day, the land heats up faster and becomes warmer than the sea. Therefore, over the land, the air rises giving rise to a low-pressure area, whereas the sea is relatively cool and the pressure oversea is relatively high. Thus, the pressure gradient from sea to land is created and the wind blows from the sea to the land as the sea breeze. In mid-latitudes, the Coriolis deflection causes turning of a well-developed onshore sea breeze.