Near the shore ,winds tend to blow out toward the water at night. what drives this process

Near the shore, winds seem to blow out towards the water at night as warm air above the water elevates and gets substituted by cooler air from the land causing the convection current.  

The convection currents conduct heat from one place to another by mass motion of a fluid like air, water, or molten rock. The heat transfer function of convection currents mediates the ocean currents of the Earth, geology, and atmospheric weather.  

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.