The Delfinas River is located in northern Crete, in the wider area of Georgioupoli, within the Chania regional unit and close to the boundary with Rethymno.

It is one of the main rivers of western Crete and flows into the Cretan Sea, contributing to the formation of the coastal landscape.

The river is fed by the waters of the White Mountains (Lefka Ori) and maintains a flow for much of the year, unlike many seasonal streams found across the island. During the winter months, its discharge increases significantly, while in summer it decreases but usually does not dry up completely.

Along its course, the Delfinas River crosses fertile land, supporting agricultural activity and helping to shape a rich natural environment. Its presence encourages the growth of riparian vegetation, while small wetland areas can form in certain sections.

At its mouth, near Georgioupoli, the river creates a wetland zone with reeds and aquatic plants, providing an important habitat for birds and other wildlife. This area enhances the ecological value of the northern coastline.

Although it lies close to Lake Kournas, the Delfinas River is not a direct outflow of the lake. Lake Kournas drains mainly through underground karst systems, which distinguishes it from surface river systems in the area.

The Delfinas River is a characteristic example of a river in western Crete, where water availability is generally higher, playing an important role in shaping both the natural landscape and local ecosystems.