This study examines wind energy resources in coastal region of Nigeria, from 1992-2010 using 18 years hourly wind speed data from HYCOM at a 10m height. The wind speed was extrapolated to hub height 100m. Weibull distribution function was employed for the assessment. The mean wind speed calculated at 10m height and 100m height were 4.64m/s and 6.44m/s respectively with their corresponding mean power as 64.9kW, 174.2Kw having mean power densities of 67.51W/m2, 181.29W/m2 accordingly. The influence of data set on weibull parameters depicts significant difference between the first five years. It can be concluded that additional of more data set improve the accuracy of the distribution.