A day or so after a full moon the tide will be high in the spring. Very high.
At Sheringham there are seemingly always a couple of wintering Purple Sandpipers. They love the granite rocks that protect the seafront. More often than not they feed and shelter among them avoiding crashing waves with amazing skill. However, when the tide is very high they leave their granite haven and venture up on to the promenade often being found among the Turnstone flocks. Out in the open they are more easily seen and photographed. We took advantage of this on our Norfolk Speciality Birds Long Weekend Tour two weeks ago.
Letter From Norfolk 