On Destination Granville Terre et Mer, you may have to walk a long way to get to the water’s edge… Then, about six hours later, the sea is at the very top of the beach. This to-and-fro is the tide. It’s the Moon that causes the tides, drawing the oceans towards it like a magnet. The Earth is constantly turning on itself, and the Moon revolves around the Earth. This creates more or less regular cycles, resulting in shifts in tide times every day. When the moon is over an ocean, it attracts it, creating a kind of “hump”. On either side of this hump, depressions are created: this is low tide. When the moon has passed over the ocean, the hump relaxes and spreads out over the shoreline: this is high tide.
Understanding the tidal phenomenon
