Classic route · the Danube

Passau ⇄ Budapest: the water outlook

The heart of the Danube: Linz, the Wachau valley, Vienna, Bratislava, Budapest. The free-flowing Wachau and the German reach above Passau are the deciders.

The chart shows the next twelve months for this route, each month scored on the tightest stretch it sails. Right now the calmest coming months are May (7%) and April (10%); August asks the most of the water at 78%: high risk.

Aug*

Sep*

Oct*

Nov*

Dec*

Jan*

Feb*

Mar

Apr

May

Jun

Jul

Last five years, month by month

2025 (top row) to 2021: marks are months that hit low water · solid = a week or more

Chance of the month going as planned; numbers show % disruption risk. Water below the dashed line: expect rerouting. *Months use the live forecast; the rest use the thirty-year record.

Sailing on specific dates? The cruise checker scores your exact window on this route, day by day, and can email you if the outlook changes.