Knowledge of the temperature at the interface between a hot liquid spreading over a cold solid substrate is important in determining the nature and extent of any freezing of the spreading liquid and/or melting of the substrate. In this paper, a simple model is studied to assess the influence of convection on the spatial and temporal variation of the interface temperature; New solutions are determined by both analytical and approximate numerical techniques. The theoretical and numerical results are compared in the case of slug Row and shown to be in good agreement Shear flow and axisymmetric flow are also considered. (C) 1997 Elsevier Science Ltd.