The best time to visit Venice is in April and May, as well as September, October and November, when there are fewer tourists in the city, but temperatures are still a pleasant 18-23 degrees. If you want to visit the city, it’s a good idea to stroll through the streets early in the morning or late in the evening, when the streets are a little bit quieter.
The summer months from June to August are also suitable for campervan hire in Venice with temperatures around 25-30 degrees, especially if you are planning an extended road trip from Venice along the Adriatic Sea. But be aware, it is also the busiest time to visit the city.