A refrigeration cycle apparatus, comprising: a refrigerant circuit that is formed by connecting a compressor , a flow passage switching device , an outdoor heat exchanger , an expansion unit , and an indoor heat exchanger via pipes, and through which refrigerant flows; an outdoor air-sending device configured to blow outdoor air to the outdoor heat exchanger ; an outdoor air temperature detector configured to detect a temperature of the outdoor air; a controller configured to control an operation of the outdoor air-sending device , and a liquid pipe temperature detector configured to detect a liquid pipe temperature of refrigerant flowing in the outdoor heat exchanger , the controller including: a dew-point temperature prediction unit configured to predict a dew-point temperature to be observed after elapse of a preset time, based on an outdoor air temperature detected by the outdoor air temperature detector ; an evaporating temperature prediction unit configured to predict an evaporating temperature to be observed after elapse of a preset time of the refrigerant flowing in the outdoor heat exchanger during a heating operation; and an air-sending control unit configured to change a rotation speed of the outdoor air-sending device in such a manner that the evaporating temperature predicted by the evaporating temperature prediction unit exceeds the dew-point temperature predicted by the dew-point temperature prediction unit , wherein the evaporating temperature prediction unit is configured to predict the evaporating temperature based on the liquid pipe temperature detected by the liquid pipe temperature detector . a refrigerant circuit that is formed by connecting a compressor , a flow passage switching device , an outdoor heat exchanger , an expansion unit , and an indoor heat exchanger via pipes, and through which refrigerant flows; an outdoor air-sending device configured to blow outdoor air to the outdoor heat exchanger ; an outdoor air temperature detector configured to detect a temperature of the outdoor air; a controller configured to control an operation of the outdoor air-sending device , and a liquid pipe temperature detector configured to detect a liquid pipe temperature of refrigerant flowing in the outdoor heat exchanger , the controller including: a dew-point temperature prediction unit configured to predict a dew-point temperature to be observed after elapse of a preset time, based on an outdoor air temperature detected by the outdoor air temperature detector ; an evaporating temperature prediction unit configured to predict an evaporating temperature to be observed after elapse of a preset time of the refrigerant flowing in the outdoor heat exchanger during a heating operation; and an air-sending control unit configured to change a rotation speed of the outdoor air-sending device in such a manner that the evaporating temperature predicted by the evaporating temperature prediction unit exceeds the dew-point temperature predicted by the dew-point temperature prediction unit , a dew-point temperature prediction unit configured to predict a dew-point temperature to be observed after elapse of a preset time, based on an outdoor air temperature detected by the outdoor air temperature detector ; an evaporating temperature prediction unit configured to predict an evaporating temperature to be observed after elapse of a preset time of the refrigerant flowing in the outdoor heat exchanger during a heating operation; and an air-sending control unit configured to change a rotation speed of the outdoor air-sending device in such a manner that the evaporating temperature predicted by the evaporating temperature prediction unit exceeds the dew-point temperature predicted by the dew-point temperature prediction unit , wherein the evaporating temperature prediction unit is configured to predict the evaporating temperature based on the liquid pipe temperature detected by the liquid pipe temperature detector . <EOS>