Tides are the periodic rise and fall of sea level caused mainly by the gravitational forces exerted by the Moon and the Sun on the Earth’s oceans, along with the centrifugal force produced by the Earth-Moon system. They are one of the most important phenomena studied in physical geography because they influence coastal processes, marine ecosystems, navigation, and sediment movement. The movement of ocean water due to tides occurs in a regular pattern, generally involving the rise of water level known as high tide and the fall of water level known as low tide. The Moon has the strongest influence on tides because it is much closer to the Earth than the Sun. The gravitational pull of the Moon causes ocean water to bulge on the side of the Earth facing the Moon. At the same time, a second tidal bulge forms on the opposite side due to the centrifugal force generated by the Earth-Moon system. As the Earth rotates, different coastal regions pass through these tidal bulges, resulting in regular changes in sea level. The fortnightly variation in the formation of tides is related