The sea surface wind and wave fields in the offshore area of the northern Jiangsu Province in the year 2016 are simulated with high-resolution atmospheric and wave numerical models and compared with observations including satellite altimetry data, scattermeter wind data, reanalysis products and in-situ buoy data. The results show that the multi-scale temporal variations exist in sea surface wind and wave fields, such as seasonal, diurnal and intra-seasonal scales. Analysis shows that the sea surface wind, significant wave height and swell are larger in winter and fall than in spring and summer, and northwestern (southeastern) wind and wave prevail in winter (summer). It is found that significant diurnal variation exist in the wind and wave fields and exhibit seasonality. The diurnal variation is stronger in nearshore areas than offshore areas. It is also found that the offshore area of Jiangsu Province may subject to the impacts of strong synoptic processes, such as cold waves and tropical cyclones.