First of all, tide is the rise and fall of water caused by gravitational forces of the moon and sun on the oceans of the earth. Generally speaking, tidal cycles contain two high tides and two low tides each day. During the time between high and low tides there will obviously be current flow. The time between high and low tides is a little over 6 hours and the entire tidal cycle repeats itself approximately fifty minutes later each day. So if you know that low tide is at 0800 today you can estimate that it will be at least 0850 tomorrow. The tidal bulge that occurs during high tide in the world ocean follows the revolution of the moon and the earth rotates eastward through the bulge once every 24 hours and fifteen minutes. The moon
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The gravitational pull of the Moon tugs on the surface of the ocean until its surface mounds up and outward in the direction of the moon. When the mound of water has reached the highest point is called high tide. On the side of the earth opposite the moon, the centrifugal force caused by the earth's rotation produces another mound of water and high tide on the opposite side of the earth. Somewhere in between these two high tides are two flat areas on the surface of the ocean, these are called low tides.
The earth's nearby moon is about 2.17 tines as effective as the m ore massive sun in raising tides on the earth, even though the sun exerts a much greater total force on the earth than does the moon.
Tides are raised in the earth's solid crust and atmosphere as well as in the oceans. Every body in the universe has some tidal effect.
Because gravity tugs on nearby things more strongly than on distant things, the oceans closest to the moon feel the greatest attraction to the moon. Being fluid, these nearby oceans move upward in response to the moon's pull, until there is a balance between the upward force from the moon and the downward force from the earth.
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The Earth is affected by the Gravitational Pulls of the Moon.
I looked on the internet to learn how the