The tide enters from the SEA - My favorites quotes from the famous Bowditch

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"In the OCEAN, the tide may be in the nature of a progressive wave with the crest moving forward, a stationary or standing wave which oscillates in a seesaw fashion, or a combination of the two. Consequently, caution should be used in inferring the time of tide at a place from tidal data for nearby places. In a river or estuary, the tide enters from the SEA and is usually sent upstream as a progressive wave so that the tide occurs progressively later at various places upstream."

CHAPTER 9. TIDES AND TIDAL CURRENTS

BOWDITCH

THE AMERICAN PRACTICAL NAVIGATOR

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