Based on the question of high and low tide, Boston experiencing a neap tide or spring tide on 26 May that is at the time of 1.15AM is of 10.8 in height and at 1.41PM its 10.3 in height, which means that there is a rise in sea levels at the morning and evening hours once due to moon and other due to Coriolis force on body of water.
The low tide at 7.28 AM has a height of -0.4 and -0.5 at 7.54. thus Boston experiences a decrease in heights of the tide. Thus there exist some variations within the tidal ranges varying magnitudes and velocities.
