Explain how sea breeze and land breeze are set up in places near the sea.

Land Breeze

In the nighttime, the reverse of sea breeze happens. As the land heats up very quickly in the daytime, it also loses its heat quickly in the nighttime, while the water retains its warmth. 

This means the air over the water is warmer, less dense, and begins to rise. Low pressure is created over the water. Cold and dense air over the land begins to rush towards the water surface to replace the warmer rising air. 

This cool air coming from the land is known as a land breeze.

A sea breeze or onshore breeze

In the daytime, when the sun is burning bright, both the land and water heats up, but land heats up very quickly and the air above it warms up a lot more than the air over the water. 

Due to being less dense, the warm air begins to rise and creates low pressure.

Now, the air pressure over the water is higher with cold dense air, which rushes towards the land to replace the warmer rising air. 

This cool air coming from the sea is known as the sea breeze or onshore breeze.