Simplified ice chart and reference charts

Normal situation Previous ice map Ice map of the previous year Icebreakers

Normal situation


The melting continues.

In the northern Bay of Bothnia in the archipelago there is rotten ice and in places very close ice. Otherwise there is open water. Southwest of the line Oulu 1 - Malören it is ice-free.

Icebreakers: Otso is heading to Helsinki. The icebreaking season has ended.

Restrictions to navigation: From today onwards minimum ice class and deadweight required of assisted vessels:
Tornio, Kemi and Oulu, II of more than 2000 tons.

Vessels bound for Gulf of Bothnia ports in which traffic restrictions apply shall, when passing the latitude 60°00'N, report their nationality, name, port of destination, ETA and speed to ICE INFO on VHF channel 78. This report can also be given directly by phone +46 31 699 100.

The next ice report

The next ice report will be published on Monday 29th of May.

About the charts

The ice chart of the whole Baltic Sea (pdf) is published in the autumn twice a week (Monday and Thursday) and daily when the amount of ice increases until until ice break-up in spring. It represents current ice situation, ice breaker positions and traffic restrictions in the Baltic Sea.

The simplified charts are updated once a week at the latest on Tuesday morning. The first one represents measured level ice thicknesses, ice coverage and sea surface temperature. The reference charts represent average, 1965 – 1986, ice situation on that day (= normaali), last week´s situation, last year´s situation and the positions of the ice breakers.

Explanation of chart's finnish words

  • jäätä: ice
  • haurasta: rotten ice


More Information