The last couple of days rip currents are in the news in the Netherlands, because it's the summer holidays, hot weather, and there was a recent casualty. And maybe because it's silly season? There was an item in the news broadcast yesterday evening that the rip currents are strongest in August because of the position of sun and moon. And today the claim was repeated in an article about a training how to swim with rip currents on one of the most popular news websites. Rip currents occur 365 day...