Rhine water levels in September

Right now a Rhine cruise in September 2027 has a 63% chance of sailing as planned past the shallowest stretch: elevated. It reflects the thirty-year record for September; the live forecast reaches this month about seven months out.

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 63% of years, 8th calmest of the twelve months on the Rhine. Book June or April for the calmest water; November and January are the months to check before you commit.

The last five Septembers, from the official record: 2026 29 low water days · 2025 clear · 2024 clear · 2023 clear · 2022 11 low water days. Recent Septembers split: 2025, 2024 and 2023 stayed clear, while 2026 and 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.