![]() These tide waves are shaped by the gravitational pull from the moon and set in motion by the spinning of the earth. Tide Wave infographic Spring and neap tides This is one of three tide waves around Britain another flows up the west coast and a third travels down the east coast, where its peak meets the English Channel wave and they travel up the coast of Europe together. Then, over the course of six hours, the peak travels up the channel towards Deal, bringing high tide. ![]() Imagine a huge wave, a tide wave, with Deal at its trough and Lands End at its peak. So when it is low tide in Deal, it is low tide in Calais – and high tide in Lands End. In fact, it pours up and down the English Channel. Their thinking is that water sloshes back and forth across the channel, and they are almost right. Where I live in Deal, Kent, many people ask if the tide is rising in Calais when it is falling in Deal. But few people understand exactly where the water comes and goes as the tide ebbs and flows. We all know that the tide is affected by the moon. These changes have a huge impact on our swims, which is why understanding the tide is crucial for swimmers. The daily transition is subtle, almost unrecognisable, but the weekly transformation is dramatic the beach literally changes shape, waves behave differently and currents flow the opposite direction. If it is high tide in the early morning today, it’ll be low tide at the same time next week, then high tide the following week. If you go sea swimming at the same time every day, on the same beach, you may notice that high and low tides alternate every week. William Thomson, author of World of Tides, explores the what’s, why’s and how’s when it comes to tides, so you can take one glance at a tide app and quickly predict what type of seas to expect. Understanding tides and how they can affect swimming conditions is crucial for sea swimmers safety.
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