A portable water sport board rack includes a pair of generally parallel forks each including a plurality of elongated prongs that define channels for receiving and storing water-sport boards. The forks are transversely connected via a support cross member, and an extension member connects the cross member to a rotational unit. An elongated rod is secured to the bottom of the rotational unit at an angle, and the device is secured to a boat through insertion of the angled rod into a rod holder.