A Wave is symbolized as one of the strongest forces on earth. so strength for one. also if you read more into it, its about faith, a wave is you against mother nature, you cannot control it, you just have to put your faith into her.
Unfortunately I cannot say I would know one if it landed right in front of me. But what I do know is that there are many things in nature, which I believe show up when least expected to comfort our hearts.