Yes to a degree. While the radar still works, rain absorbs the signals and significantly reduces the range of your radar. This means that boats and objects must be much closer for the system to pick them up. In addition, rain can also reflect a certain percentage of the signal, which ‘clutters’ the radar and masks other objects. This does allow you to pick up rain and track storms as they approach you with the radar. No longer will a storm creep up on you in the dark of the night as the radar will warn you before the storm's arrival of its presence.