Air temperature is about -15 centigrade (5°F), water is 0 to -2 centigrade (32—28°F); being salty, it freezes below zero. Evidently, it's high time to surf.
This astonishing video was taken on December 20 and 24 on Russky island, Chernyshev bay.
The island is situated just off Vladivostok at 9300+ kilometres from Moscow (yeah, Mother Russia is great, and even greater than that!).
As Alexander Suvorov once said, "We are Russians! What a delight!"
Nothing to add, isn't it? ;-)