Explain how the wind blows at the beach during the day and at night?

When you are on the beach, during the day the sun heats the land and makes the air above it hot this air rises and pulls in air from the sea to replace it, this is a sea breeze.

At night the land cools down and when it is colder than the sea (which remains almost the same temperature day and night) then hot air rises from the sea surface and it pulls in air form the land, this is a land breeze.