The air-sea exchanges of momentum which are often parameterized by the variation of drag coefficient (C_D) and wind speed (u_n), is largely uncertain at typhoon-force extreme values of u_n. This paper investigated the relationship between C_D and extreme values of u_n for five different heights using the eddy covariance method from two coastal observation towers during the landfall of Super Typhoon Maria. In particular, our observations include 10-min average u_n extended to high wind speed of 42.27 m s^-1. The relationship between C_D and u_n was parabolic from regression analysis, and the “roll-off” of C_D and u_* appeared at about 28 m s^-1. From the bottom to top heights, the corresponding u_n of C_D extreme were 9.95, 12.72, 22.32, 32.57 and 38.04 m s^-1, respectively. The trend of negative tangential turbulent flux with u_n was found to be the main cause for the C_D extreme drifting with heights.