Venice Climate Patterns

Venice has warm, humid summers and cool, damp winters, with its lagoon setting moderating temperature while increasing humidity. Fog is most common in the colder months, and summer heat can feel more intense in enclosed streets with limited shade.

Acqua alta is a temporary high-water event produced by the interaction of tides, atmospheric pressure and winds over the Adriatic. It is most frequent from autumn into early spring and affects low areas such as Piazza San Marco first. Conditions can change within hours, so the city's live tide forecast is more useful than a general seasonal rule.

The MOSE barriers now prevent many forecast extreme tides from entering the lagoon, but they do not eliminate every local flood or the longer-term risks created by sea-level rise, subsidence and lagoon erosion. Visitors should follow current municipal alerts rather than relying on old accounts of routinely flooded streets.