During spring tides, the "high" tides are really high and the "low" tides are unusually low. Things get less extreme when the sun and moon sit at right angles to each other (relative to Earth). Such an arrangement will produce a neap tide; a period in which the difference between high and low tides is minimal. When Continents Interfere
These are the two high tides in a day. The two times that correspond with moonrise and moonset are the two low tides each day. Commonly, there are two high tides in a little over a 24 hour period, with each high tide happening approximately 12 hours and 25 minutes between each tide.
They are however only predictions, the actual time and height of the tide is affected by wind and atmospheric pressure. Many shorelines experience semi-diurnal tides—two nearly equal high and low tides each day. Other locations have a diurnal tide—one high and low tide each day. A "mixed tide"—two uneven magnitude tides a day—is a third ...
This creates a low tide because the center of the ocean is bulged causing the ocean to move away from the shore. The Pacific Ocean will bulge in the center on the opposite side of the earth, creating a corresponding tide. If the edge of an ocean is centered under the moons gravitational force then a high tide forms.
The part of the Earth with the water getting pulled towards the Moon experiences a high tide, and same with the part on the opposite side of the Earth with the other bulge.
High and low tides are caused by the moon. The moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest from the moon. These bulges of water are high tides.
The key to understanding how the tides work is understanding the relationship between the motion of our planet and the Moon and Sun. As the Earth spins on its own axis, ocean water is kept at equal levels around the planet by the Earth's gravity pulling inward and centrifugal force pushing outward.
In fact, if you're meticulous, you can measure the water level over a long period of time, and can see not only the high tides and the low tides, but also where the Spring Tides and Neap Tides occur.