The lizard Angolosaurus skoog; inhabits the surface and subsurface environments of sand dunes of the northern Namib Desert. We have related posture, locomotion, and other aspects of surface activity to the microclimate prevailing above and below the surface. Globe temperature was the best microclimatic correlate of surface activity. From our analysis, we concluded that surface thermoregulatory behaviour of A. skoog; is facultative, and aimed at maintaining a body temperature compatible with foraging and other obligatory surface activities. Keywords: Angolosaurus skoogi, Dunes, Lizards, Microclimate, Thermoregulatory behaviour.