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When we choose a venue on one of Britain sea cliffs, we look at one of two site for tidal information. Checking the tide times, for access purposes. But also the size of the swell (waves), as sometimes this can be something we overlook. The last thing you want is when on a hanging belay just above the sea, big waves coming in to wet your stance. Wet ropes, gear and feet can make a day very unpleasant ????.
WHAT ARE TIDES?
Tides are the daily rise and fall in surface water levels of bays, gulfs, inlets and oceans and vary depending on the day and location. Most coastal areas experience two high tides and two low tides every day and they may not be equal. (In some places, such as the Gulf Coast, you may only get one high and one low tide per day.) The height difference between high tide and low tide is called the tidal range. In some areas, the difference between high and low tides may not be so noticeable. In other areas, it can be quite stark, like Pembrokeshire, which is very well known for its large tidal ranges.