Rhine water levels in May

Right now a Rhine cruise in May 2027 has a 20% chance of running into low water at the shallowest stretch: moderate. It reflects the thirty-year record for May; the live forecast reaches this month about seven months out.

May is snowmelt season proper: the Alps are shedding winter into the rivers and levels are reliably at their fullest. This is the water the spring cruise season is built on.

Across thirty years of records, May brought low water to the Rhine in about 20% of years, 2th calmest of the twelve months. The calmest months here are June and May; the most exposed are August and September.

The last five Mays, from the official record: 2026 9 low water days · 2025 clear · 2024 clear · 2023 clear · 2022 clear. Recent Mays split: 2025, 2024, 2023 and 2022 stayed clear, while 2026 hit low water.

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.

Sailing on specific dates? The cruise checker scores your exact window, day by day. For the whole season, see when to go or the full Rhine page.