IP67 that rating means you can submerge the watch underwater for up to a depth of 1 metre for 30 minutes. Now, that might sound like you can go swimming with it, but you can't. That rating actually means they're not designed for swimming, diving, or prolonged submersion in water. Washing your car or hands is fine, anything else and you're out of luck.
It's not all doom and gloom on the Android Wear front for water lovers, though. The ageing but still popular Sony SmartWatch 3 has an IP68 protection rating, which according to Sony, makes it protected against water as long as you don't take it any deeper than 10 metres underwater for longer than 30 minutes. That water should also be fresh water. Sony says it can be used in chlorinated swimming pools as long as you rinse it in fresh water afterwards. It's no good for seawater or salt water pools.
There's more good news for newer additions to the Android Wear watch family as the Casio Smart Outdoor Watch WSD-F20 is waterproof up to 50 metres. The Mission by Nixon also comes with a 10ATM waterproof rating so you can go swimming with it up to 100 metres, giving it the highest waterproof rating of any Android Wear watch so far.