The Volturnalia was held on August 27 to honor Volturnus, an ancient deity associated with the Tiber River and possibly winds or seasonal changes. The festival featured drinking wine and celebrating the late summer bounty before autumn's onset. Rituals sought to ensure the river's continued benevolence and safe passage for boats and goods. In poetry, Volturnalia evokes the sanctity of rivers in Roman life, humanity's dependence on waterways for sustenance and commerce, and appears in works celebrating natural cycles, regional deities, and the relationship between urban civilization and natural forces.

Volturnalia on August 27 honored Volturnus, god of the Tiber River, with offerings ensuring favorable waters and protection. The festival's late summer timing connects to river levels and navigation concerns as autumn approached. Understanding Volturnalia helps illuminate Roman river worship and the religious dimensions of water resources. The festival demonstrates Roman attention to local geographical features and their divine personifications, treating the Tiber as both natural resource and divine entity requiring ritual propitiation and thanksgiving.