Rhine water levels in August

For August 2026 the Rhine stands at 91% low water risk at its shallowest stretch: high risk. This comes from the live forecast and is updated every morning.

By August the Alpine snow bank is spent, and the rivers live on whatever rain the summer brings. Hot, dry summers show up here first.

The long record puts August at low water in about 30% of years, the riskiest of the twelve months on the Rhine. Book June or May for the calmest water; August and September carry the most risk.

The last five Augusts, from the official record: 2025 7 low water days · 2024 clear · 2023 3 low water days · 2022 29 low water days · 2021 clear. 2024 and 2021 came through August clear; 2025, 2023 and 2022 did not.

Affected rarely means canceled. On the Rhine it usually means a ship swap, a rerouted day, or a stretch covered by bus, almost always at the gorge between Rüdesheim and Koblenz. That shallow reach decides every Amsterdam to Basel itinerary.

For your own dates, the cruise checker scores the exact window day by day. The Rhine page carries the live gauges, and when to go compares all four rivers.