Water molecules in waves don't actually move in a wave pattern themselves. It's a common misconception that water molecules travel long distances with the wave. Instead, they move in a circular pattern.

Here's how it works:

1. Wave Energy: The energy of a wave travels through the water, but the water molecules themselves don't travel far.

2. Circular Motion: As the wave passes, water molecules move in a circular path. They go up as the crest passes and down as the trough passes.

3. Decreasing Amplitude: The diameter of this circular motion decreases as you go deeper in the water. At a certain depth, the water is essentially undisturbed by the wave.

So, the wave is more of a pattern of energy transfer rather than a movement of water molecules across the surface. Think of it like a ripple in a pond - the ripple spreads, but the water itself just moves up and down.