When winds from two different areas meet together, the warmer air is less dense and rises up above the cooler air. This happens around latitudes 60' north and south of the Equator, where air from the polar regions meets air from the tropics. Winds and Atmospheric Circulation Wind can be generally defined as moving air usually in response to a pressure gradient. Variations in temperature and pressure provide the means to drive the winds of the world. If all points on our planet were at exactly the same temperature and pressure then we would have no wind.
Air always moves from an area of high atmospheric pressure to an area of low atmospheric pressure.
Near the coast an onshore wind frequently sets in during the late morning, rises to a maximum in the early afternoon and then dies down in the evening. The strength of breeze is greater on warm days, but may be weaker under cloudy conditions. It is called a Sea Breeze. The basic cause of the air flow lies in the different rate of heating of the land and sea surfaces when exposed to solar radiation. As we know that land and water do not absorb energy in the same way.