A rapid and convenient temperature indicator is provided having a tubular heat-conducting member joined at one end to a heat sink and having the other end rounded for ease of contact with the surface whose temperature is to be measured. Conveniently, a cylindrical protective cover is provided which is slidably mounted on the heat sink by means of a slot relieved threaded member and nut. The heat-conducting tube has a darkened surface which is coated with a liquid crystal composition having a mesophase temperature range which provides a temperature response in the range of interest. One or more liquid crystal compositions may be employed providing bands along the tube. A reticule is provided, which can be calibrated to give an accurate approximation of the temperature of the surface being measured.