Rhine at Record Low: Key Stretch Effectively Closed to Cargo

Germany's Rhine River has hit unprecedented lows amid a prolonged summer heatwave, effectively shutting down commercial navigation at its most critical bottleneck. The federal waterways authority, WSV, reported on Tuesday that the navigable water depth at Kaub, near Koblenz, has dropped to just 15 centimeters—well below the previous record low of 25 centimeters set in 2018.

With the river at this point measuring roughly one meter deeper than the navigable depth, the shallow channel has made transit perilous. One commodity trader noted that commercial sailings through Kaub have essentially ceased, making it impossible to book new cargo shipments past the point. While there is no formal rule mandating a halt, most operators are choosing not to risk the passage, though a few empty vessels may still attempt it. The trader added that some ships already south of Kaub now face the prospect of being stranded.

The low water is forcing cargo vessels to operate at just 20% capacity, a severe constraint that multiplies shipping costs as loads must be split across multiple partially-filled ships. While northern sections of the Rhine remain navigable, the disruption at Kaub is significant. Freight is being diverted to trucks, and some German states have relaxed weekend driving bans to accommodate the surge in road transport.

Analysts warn that this logistical bottleneck could dent German economic growth just as the country shows tentative signs of recovery. The Rhine is a vital artery for transporting grains, minerals, coal, and refined oil products, and its impairment adds fresh pressure to an already strained supply chain. The situation follows successive heatwaves and scarce rainfall across much of Europe this summer, which have left the continent's waterways at critically low levels.