Meet the SearchGPS Surf Watch: a smart device for surfers. This cool watch keeps track of your stats. With this watch, you will be able to monitor your wave count, speed, distance, and other useful information. The device has a companion app and website you can use to review your surfing sessions. You get location maps, image sharing, and graphic charts.
We are assuming the Search GPS watch is waterproof. It may not be the smallest watch around, but it does track your surfing stats. Not sure how much this will cost, but you can sign up to get notified here.