Walking in Poissy can be a practical way to explore the town, as many key areas are within a reasonable distance. The town features a mix of urban and green spaces, offering pleasant routes for pedestrians. However, the infrastructure in some areas may be more car-oriented, which could impact the ease of walking in certain parts. Generally, the compact layout of the town center makes it accessible on foot, but longer distances or fragmented pedestrian pathways in outlying areas might make walking less convenient for reaching all destinations.

Cycling through Poissy offers a scenic way to explore the area, especially with its routes along the Seine River and nearby green spaces. The town features some cycling paths, which make certain areas accessible by bike. However, the availability and extent of dedicated bike lanes may vary, so riders should plan routes carefully. The relatively compact layout of Poissy makes shorter trips manageable by bike, though some areas may require navigating shared roads.

Getting around Poissy by public transit is convenient, with options including buses and train services. The RER A train connects Poissy to Paris and other areas, making it a practical choice for regional travel. Local buses serve various parts of the town and nearby areas, with some operating on eco-friendly natural gas. The infrastructure around the railway and bus stations has been developed to support smooth transit. Public transportation is generally accessible, but the suitability of these options may depend on specific destinations and travel needs.