As an expert in oceanography, I can explain that the tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth. Tidal cycles are complex and can be influenced by many factors, including the shape of the coastline, the depth of the sea, and local weather conditions. In a typical lunar day, which is about 24 hours and 50 minutes, there are two high tides and two low tides. This is because the Earth rotates through two tidal bulges created by the gravitational pull of the Moon. High tides occur approximately 12 hours and 25 minutes apart, and it takes about six hours and 12.5 minutes for the water level to change from high to low, or from low to high. read more >>

Because the Earth rotates through two tidal ��bulges�� every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes. High tides occur 12 hours and 25 minutes apart. It takes six hours and 12.5 minutes for the water at the shore to go from high to low, or from low to high.read more >>