what is the average height difference between the high tides and low tides?
The difference in height between successive high and low tides is called the tidal range. In the chart shown on the right, the largest tidal range in 6 feet, the difference in height between the 1st low tide (1 foot) and the 2nd high tide (7 feet). (Tidal range = 7 feet – 1 foot = 6 feet.)