Abstract: A slope indicator for indicating the slope of a golf green, comprises a polycarbonate flat circular base and a dome-shaped transparent cover that is filled with distilled water and has an observable bubble. The base has a spike extending from its lower surface and a circular flange extending from its upper surface that has a circular slot. The cover has a periphery which has a circular slot that receives the base flange to form a dome-shaped chamber having a predetermined volume. A direction indicator and radially-spaced slope markings are molded into the cover. The slope indicator is assembled by inverting the cover and metering a predetermined quantity of distilled water into it that is less than the volume to create the bubble. The base is then assembled to it with glue. In use, the slope indicator is placed on a golf green with the spike engaging the golf green. If there is any slope, the bubble will displace from the top of the dome.