It takes more than a watchful eye to play it safe at the beach. They're called sneaker waves because they appear without warning, often surging high up on the beach with deadly force, and are impossible to predict. The ocean is strong enough to pick up even the biggest log and plop it down on top of you. Some logs may look small, but even the tiny ones can be waterlogged and weigh tons. These currents can swiftly sweep unwary beachcombers and waders off their feet and out to sea.
Incoming tides isolate rocks from headlands and the shore.
Avoid the temptation of strolling out to an interesting rock without knowing when the tide rolls back in. Free tide tables are readily available at state park offices, information centers and many shops and motels. Stay off rocks and small, enclosed beaches when the tide is coming in. Tides and waves can sweep over rocks, jetties and headlands, knocking you off and carrying you out to sea. Take care around high, steep cliffs Assume that all cliff edges are unstable.