Why do tides not occur at the same time every day?

The main thing that affects the tides is the gravity of the Moon. In a poor second place is the gravity of the Sun. read more

The tide is all about harmonic! How harmonic the water can move to and fro in period of 24 hours and 50 minutes, or 12 hours and 25 minutes or, any combination of the two. read more

Most coastal areas, with some exceptions, experience two high tides and two low tides every lunar day (Ross, D.A., 1995). Almost everyone is familiar with the concept of a 24-hour solar day, which is the time that it takes for a specific site on the Earth to rotate from an exact point under the sun to the same point under the sun. read more