Wind fields in the Bohai Sea are continuously simulated by wind model WRF in order to determine the wind energy resources from 1995 to 2014. And then, wave hindcasting data are simlated by SWAN in the same time range. Comparisons of wind speeds and significant wave heights between simulations and observations show good agreement. The results show that wind and wave energy are validated with measured data. Then, wave and wind energy of Weifang sea area are assessed by 20 years wind data and the wave data. The assessment results showed that Weifang sea area possesses huge wind and wave energy potentialities. Annual average wind energy density reaches up to 429 W/m2, wave power density reaches up to 1.3 kW/m. The combined exploiting of wind energy and wave energy is suggested.