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Surfers are often heard to say, on a day of meagre waves, that one should wait for the tide to turn because the waves will get bigger when the tide is 鈥渙n the push鈥�. Is there any reason to believe that waves will increase in height with an incoming tide?

Colin Risner St Austell, Cornwall, UK

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This article appeared in print under the headline 鈥淪urf鈥檚 up鈥�