An investigation of the tidal oscillations near the winter northern polar mesopause has been carried out at Resolute Bay, Canada (74.9¿N, 94.9¿W). The daily, monthly, and annual variations of the tidal field were studied using the 1995/1996 and 1996/1997 data. Ground-based measurements were obtained using a Fabry-Perot interferometer with a circle to line interferometric optical system (FPI/CLIO) and the E Region Wind Interferometer (ERWIN). The FPI/CLIO observed the Doppler winds of the OH emission near 86 km altitude. The ERWIN provided simultaneous OH (near 86 km) and OI (near 97 km) wind measurements. Monthly data were compared to the Global Scale Wave Model (GSWM) and the Forbes/Vial Solar Semidiurnal Tidal Model predictions. Analysis of the 12-hour oscillation near 86 and 97 km altitudes indicates that it is persistent and characteristic of a semidiurnal propagating tide. The semidiurnal tide was found to be highly variable in amplitude and phase from day to day. The observations presented provide a continuous and extensive data set for the winter season.