A spring tide occurs on the full moon and new moon day. Various forces are united at two opposite positions on earth. So, there is a greater force and pull on seawater. Thus formed the spring tide. High tides of spring tide are higher than the average high tide and low tide of spring tide is lower than the average low tide.
A neap tide occurs when the position of the sun, moon, and earth are at right angles. During neap tide, gravitational and centrifugal forces are divided. The high tides of a neap tide are lower than the average high tide and the low tides of a Neap tide are higher than the average low tide.