Systems, devices, and methods are provided for leveling and monitoring a wind turbine tower. An exemplary system may comprise an accelerometer, signal transfer device, signal receiving device and signal display device. In an exemplary embodiment, the system is installed at or near the top of the wind turbine tower. The system maybe permanently installed. The installer may adjust tower mounting nuts to level the tower based on the display device information. In another exemplary embodiment, the system may be used for monitoring tower vibration during wind turbine operation and measuring wind speed during wind turbine operation.