The surf, Dude, is up. The Roxy Deep Tide Watch gives you tide tables for 200 beaches on 5 continents and even includes a "surf heat timer" which goes off when that impetuous Ryan punches another stoner on the OC. It's water resistant to 10 ATM and is mostly for girls, but I guess guys can wear the sexy blue strap as well. Priced at $90, it's coming in on the low-end of these kind of fully-featured surf watches.
roxy deep tide watch [Travelizmo]
Prices for Roxy Deep Tide Watch [Froogle]