How do I find my last location? Lost watch, battery dead but would like to know last location

I should have elaborated as to what I meant by saying it could be on your iPhone. If you just want to know the places you have been recently, go to your iPhone Settings/Privacy/Location Services (tap on it) scroll all the way to the bottom to "System Services" (Tap on it) roll down to "Significant Locations" (Tap on it) It shows a History of locations you have visited recently. It might be helpful as it tells you where you where and the date and time of your being at a particular place. Good luck.

If your watch has been offline more than 24 hours you have missed the window in Find my iPhone. At that point you are down to searching the old fashioned way by using Mk1 Human Eyeball in likely places.

Your iPhone might have it.

Nice find, I'll remember that for the future.