The recommended seasons for the Danube Cycle Path Passau-Vienna are:

The best times for the Danube Cycle Path are in spring May and June and in autumn September and October. In midsummer, in July and August, it is too hot. But if you have children who are on vacation in summer, you will still be on the Danube Cycle Path during this time. One advantage of the summer temperatures comes when camping. In midsummer, however, it is advisable to get on your bike very early in the morning and spend the hotter days in the shade by the Danube. There is always a cool breeze right near the water. In the evening, when it gets cooler, you can still cover a few kilometers along the Danube Cycle Path.

In April the weather is still a bit unstable. On the other hand, it can be very nice to be out and about on the Danube Cycle Path in the Wachau during the time when the apricots are in bloom. At the end of August at the beginning of September there is always a change in the weather, as a result of which the stream of cyclists on the Danube Cycle Path decreases significantly, although ideal cycling weather prevails from the 2nd week of September to mid-October. It is particularly nice to be out and about on the Danube Cycle Path in the Wachau during this time, as the grape harvest begins at the end of September.