A pontoon tarpaulin system for efficiently covering a pontoon. The pontoon tarpaulin system includes a plurality of support poles vertically extendable from a floor of a pontoon, a plurality of support bands extending between the ends of the pontoon and attachable to an upper end of the support poles, and a tarpaulin attached to a core capable of being rolled upon support bands. A handle is attachable within the core for allowing the user to roll the tarpaulin from an open position to a closed position. A plurality of rear supports are attachable to a rear of the pontoon for supporting the tarpaulin when rolled into a storage position. A plurality of front hooks are attachable to a front of the pontoon for catchably engaging the core when the tarpaulin is in the closed position.