土ど用よう波なみ

noun

high waves during the dog days of summer

Refers to large waves that often appear along the Pacific coast of Japan during the late summer 土用 (doyō) period, typically associated with distant typhoons.

• 土ど用よう波なみが立たつと、海かい水すい浴よくは危き険けんになる。

  When the doyō waves rise, swimming becomes dangerous.

• 今年ことしの土ど用よう波なみは例れい年ねんより高たかい。

  This year's doyō waves are higher than usual.