Naruto Whirlpools are a natural phenomenon
in the Naruto Strait (width: 1.3km), a channel between Magosaki, Naruto and
Tozaki, Awaji Island.
The whirlpools of the Naruto Strait are
formed because of the ebb and flow of the tides influenced by the gravitational
pull of the Sun or Moon and because of complicated geographical features. During
a spring tide (around New moon and Full moon), the speed of the water may reach
20km/h, a tidal difference may reach to 2m, the water rushes with tremendous
force through the Naruto Strait from the side with the higher sea level to the
other. Consequently, whirlpools as large as 20m in diameter are produced. In
old times, it was feared as a non-navigable Strait by the seamen.
The center of Naruto Strait is deep, the
water flows fast smoothly, whereas both sides of it are shallow, the water does
not flow fast because of the reefs. The swirling whirlpools appear between the
faster current in the center and slower currents on the sides.
As the whirlpools are caused by tides, the
times (the appearance of whirlpools) vary every day. Outside of these times,
the whirlpools cannot be seen.
Please check the Whirlpool Calendar before
making travel plans.