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Difference between Tides and Waves. Key Difference: Tides are the rise and fall of sea level that is caused by the gravitational pull of the moon and the sun on the Earth. Waves are actually energy that moves across the surface of the water.
When the highest part, or crest of the wave reaches a particular location, high tide occurs; low tide corresponds to the lowest part of the wave, or its trough. The difference in height between the high tide and the low tide is called the tidal range. A horizontal movement of water often accompanies the rising and falling of the tide. This is called the tidal current. The incoming tide along the coast and into the bays and estuaries is called a flood current; the outgoing tide is called an ebb current.