Rhine water levels in September

Right now a Rhine cruise in September 2026 has a 7% chance of sailing as planned past the shallowest stretch: high risk. 26 days of this September are already on record. The figure counts what the river actually did on those days and the live forecast for the days left.

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.

September runs on rain, and early autumn storms often begin the refill. A wet start to the season can make it a lovely, quiet month on the water.

The long record has September running as planned in about 57% of years, the most weather-dependent of the twelve months on the Rhine. Book June or March for the calmest water; September and October are the months to check before you commit.

The last five Septembers, from the official record: 2025 clear · 2024 clear · 2023 clear · 2022 12 low water days · 2021 clear. Recent Septembers split: 2025, 2024, 2023 and 2021 stayed clear, while 2022 hit low water.

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.