Tides are the regular rise and fall of water levels along the coast and are essentially very long-period waves that move though the ocean due to the gravitational pull of the moon and sun. This wave originates in the ocean and then move toward the shoreline and makes the level to go up and then go down.
Gravity is one of the major forces that work to create tides. The moon and the sun’s mass work to pull the surface of the ocean water. Since the moon is much closer to the earth than the sun, the gravitational force of it is much greater than the sun. The sun’s effects on generating tides is half of what the moon generates.
The pull of the moon and sun cause the high and low tide though the creation of a bulge of water toward the moon. The rotation of the earth creates another bulge of water away from the moon. The bulge if water is the high tide. In between is where you have the low tide....