A water-watcher is someone, of any age or nationality, who likes looking at water, in any of its forms. Water watchers enjoy this pleasurable pastime, whatever their educational background; but more knowledge of what to look for will, it is hoped, lead to even more satisfaction. The intention is to encourage interest in looking at water or watery fluids, which are all around us. You don't need any equipment, licences or permits, nor any special qualifications, other than some curiosity, a sense of wonder. The treatment won't be too technical, but hopes to show you how some natural laws control the behaviour and appearance of water. Some knowledge of this can make water so much more fascinating, wherever you see it.