Which bay is famous for having the highest tides in the world?

The bay famous for having the highest tides in the world is the Bay of Fundy, where the average tidal range is about 16 metres.

This dramatic bay lies between New Brunswick and Nova Scotia in eastern Canada, with a small portion extending into Maine. It is an arm of the Gulf of Maine and opens into the Atlantic Ocean. Its funnel shape narrows inland, helping amplify the rise and fall of the water through tidal resonance.

The Bay of Fundy experiences semidiurnal tides, meaning it normally has two high tides and two low tides each day. Roughly 100 billion tonnes of seawater can flow in and out during a half-day tidal cycle—about twice the combined flow of all the world’s rivers over the same period.

The bay’s tides produce striking natural phenomena, including tidal bores in rivers such as the Petitcodiac and whirlpools near Passamaquoddy Bay. The record high water level, about 21.6 metres, was recorded in October 1869. The “highest tides” claim refers to tidal range, not simply the height of one isolated wave.