Surfing Break Walls

In Japan, we have a lot of fishing ports. To the sides of the ports they have break walls to protect the boats and harbor. Also there's break walls to just protect the coast line. Depending on the swell direction, they sometimes create a fun wave.
Fast forward to 1:40.
This is another one in Waikiki.
Fast forward to 1:40.
This is another one in Waikiki.