I do not personally surf but I was surprised to see that an individual can actually surf in lakes or rivers. Do you surf?
I don't surf, but I live a mile from the Atlantic Ocean.  Lots of surfers in this area.
I lived in Charleston, SC for years on the Atlantic. I was also surprised to see that surfing started with the ancient Polynesians.
Wow!  That's interesting.  Polynesian Culture fascinates me.  Have you ever been to Hawaii or French Polynesia?
I have never been to Hawaii but would love to visit there! I see that Hawaii is the most northern island group in Polynesia. have you visited there?