Surfer's ear probably not a concern?
A lot of people seemed to agree with this post, but I thought about it for a moment and am skeptical. I think it would probably only make a difference if the water is entering deeper into the ear during surfing, versus being blocked by an air pocket when just submerging your head in calm water. When I've gone swimming or surfing, usually there's some amount of water entering much deeper into the ear due to turbulence of the fluid and I have to shake my head to get some of it out.