A UK online exclusive the Ultratide watch is the world's first real-time surf conditions watch! With 10 times more data than a traditional watch the watch can tell you all you need to know for your next surf session: swell height/ direction forecasted swell height/ direction real time tide wind water temperature air temperature sky conditions and tomorrow's tide. Epic session? Follow your friends and share your session with the Ultratide app (iOS only). Size: one size.