A pre-operational test of a loosely coupled wave-tide-surge model was carried out during the 1994-95 surge season. The model was incorporated into the suite of programs which comprise the operational storm surge model on the Storm Tide Warning Service's (STWS) UNIX workstation. This model uses wave data from the Met. Office's European Wave Model (EWM) which has a resolution of approximately 25km. This model was run every day throughout the surge season after the standard CS3 run. Complimentary tests were additionally carried out at POL. These involved an investigation into the effects of waves on the surface and bottom stresses. Wave dependant surface stress formulations used in the loosely coupled wave-tide-surge model were those by Jannsen (1989) and Johnson & Vested (1992). The wave dependant bottom stress formulation of Christoffersen & Jonsson (1985) was also used. Experiments showed that waves have a large effect on the bottom stress and a small effect on the surface stress. The wave dependant bottom stress has a large effect on the tide. It was found that the tide was modified by up to ~ +-20cm. The timing of the tide was modified leaving a tidal signal in the residuals - an effect which has been seen in observed residuals, particularly in the Bristol Channel. The effect of wave dependant surface stress on the surge component was shown to be very small (less than ~ +-5cm).