Danger of frostWSA issues ice warning for the German Baltic Sea

David Ingelfinger

 · 07.01.2026

Frozen fairway buoy in the Strelasund. Temperatures in 2010 were around minus six degrees.
Photo: dpa;pa
Ice is expected to form between Flensburg and the Polish border with immediate effect. The Baltic Sea Waterways and Shipping Authority (WSA) issued an official ice warning for the entire German coast on 5 January 2026, which warns of unreliable buoyage in addition to ice formation.

In recent years, similar reports have mostly been a precautionary measure. This winter, there are many indications that skippers in the region will actually have to expect restrictions due to ice formation.

Ice warning for shallow waters

Background of the official warning is the prolonged period of frost in the north of Germany. As temperatures remain permanently in the minus range, the first solid ice is already forming, especially in shallow and sheltered waters and in the bays.

The WSA recommends that these areas should only be navigated with ice-strengthened vessels - a requirement that ordinary pleasure craft do not usually fulfil. Anyone who nevertheless has their boat in the water or is currently travelling in the area should check the navigability of harbours, approaches and shallow waters on a daily basis.


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Restricted navigation

Navigation is also not unaffected by the current ice conditions. The WSA expressly warns that buoys can drift, be pushed under water or damaged by ice. The fact that numerous buoys in the Baltic Sea have already been replaced with unlit winter marks makes navigation in the affected areas even more difficult.

Danger from storm Elli

The situation is likely to get worse next weekend, from 9 to 11 January. Storm Elli will bring wind, snow and icy temperatures. The cold could accelerate the formation of ice. At the same time, there is a risk that the wind will push the ice into harbours and bays. There, the resulting ice pressure threatens to strain or damage hulls and jetties.


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