Lake Poyang is a strongly wind-affected region. The wind stress, as the secondary driver after the catchment forcing and effect of the Yangtze River, may influence the flow pattern of local lake body at certain times, which affects the transport and diffusion processes of sediment, pollutants and nutrient substances. Based on two-dimensional hydrodynamic model, the flow distributions and circulation patterns were simulated under uniform wind conditions. Comparisons were made between cases of no wind and uniform wind in order to investigate the spatiotemporal patterns of the flow. The results showed that, for NE and SSW steady winds at 3.03m/s speed, the impact of wind on water level was negligible, and the effect on flow was mainly restricted to the west coast and eastern bay between the middle of July and the end of September. In the affected regions(about 16% of the total lake area), obvious circulations were noted, which showed spatial and temporal variability, and where average flow velocity was approximately twice as much as that for no wind condition. NE and SSW wind-driven circulations occurred in similar locations but corresponding flow directions were opposite. In comparison to previous hydrodynamic simulations of Lake Poyang that ignored wind effect, this study enhanced the understanding of the location, magnitude and pattern of uniform wind forcing effect on flow. It hints the potential uncertainty in sediment and pollutant transport modelling when dealing with wind conditions.