Ocean waves are created by the wind as it blows across the surface of the water. The energy from the wind transfers to the water, forming ripples that can grow into larger waves. These waves can vary in size and strength, depending on factors like wind speed and distance traveled over the water. As waves approach the shore, they begin to break, creating the foamy whitecaps often seen on beaches. The shape and height of waves can also be influenced by underwater features, such as reefs and sandbars, which can affect how waves form and crash onto the land.