The described technology is generally directed towards having a wireless network device assist a user equipment to facilitate narrow beam handover. A network device determines narrow beam handover candidates of neighbor cell sites based on geometric relationships between the user equipment, a serving cell site and the neighbor cell site candidates. Historical information such as previous narrow beam handovers from a serving beam to neighbor narrow beams can be used to select a lesser number of the possible candidate beams. The network device sends the candidate beams to the user equipment, which then measures and reports the measurements to the network device. If handover criteria based on the measurement is met, the network device orders a handover to a selected narrow beam, e.g., the narrow beam with the best measurement data of the candidates.