Bite notes: Skeptics will struggle to argue against this analogy.
It's an effective explanation of why it's no good looking at just a few years of temperature records to make the claim that warming has stopped. At least 30 years of records—or in the case of the analogy, 30 waves—are needed to demonstrate a meaningful trend.
Perhaps, if you want to take the analogy even further, by cherry-picking a series of waves between a high one and a subsequent lower one, you could deny that the tide is coming in! And even, if you're so minded, maybe start a website to undermine the efforts of the 'tide-ists'
For more variations of the variation:trend = waves:tide analogy, search for keyword "waves."