Islay
The Corryvreckan Whirlpool
July 2017
The Gulf of Corryvreckan is a narrow tidal strait between the islands of Jura and Scarba in Scotland’s Inner Hebrides. Currents can exceed 4 metres per second and may reach approximately 10 knots, producing the Great Race, standing waves, powerful eddies, and transient whirlpools at particular stages of the tide.
The extreme conditions are created as tidal water is forced through the constricted, glacially carved channel and across its irregular seabed. Modern sonar surveys indicate that a shallow bedrock wall, rising to less than 30 metres below the surface, contributes to the standing waves. Farther west, the main tidal current meets a counter-rotating eddy along Scarba, creating the whirlpools for which Corryvreckan is known.
The Gaelic name Coire Bhreacain is commonly interpreted as “Breacan’s cauldron” or “cauldron of the speckled seas.” In one traditional account, a Norse prince named Breacan attempted to remain anchored in the turbulent water for three days and nights to win the right to marry a local princess. His ropes, made from hemp, wool, and maidens’ hair, failed, and his vessel was drawn into the current. The story is folklore rather than documented history.
