Systems and techniques for a pontoon covering system are described herein. In an example, a pontoon cover on a spindle is mounted to the rear of the pontoon using a one or more mounting brackets, the mounting bracket including a first portion configured to translate longitudinally with respect to second portion. The cover can be positioned over a support structure connected to the pontoon. The support structure may allow the cover, including a cover securing member support to be aligned with a cover securing member attached to the side of the pontoon. The cover may be secured in the front by a front securing member, and pulled taut over the support structure by turning a handle connected to the spindle while the cover securing member is secured or engaged at least partially within the cover securing member support.