New York State launched Master Plan in 2019 and aimed to reach the 9 GW offshore wind goal by 2035. Currently, four offshore wind farms are under planning with a total capacity of ~4.2 GW. We simulated the four offshore wind projects by using wind farm parameterization (WFP) from the weather research and forecasting (WRF) model and evaluated their performances in ten-day periods of each summer and winter peak from 2016 to 2020. The mean generation of ~1.4 GW in summer and ~2.1 GW in winter can theoretically fulfill ~17.7% of the summer peak demand and ~35.9% of the winter peak demand. Meanwhile, a strong diurnal pattern in summer shows that very limited generation in the daytime and noticeably higher generation in the nighttime is observed. The simulation results provide significant implications for power grid operating management and regulations.