Simplified ice chart and reference charts

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

Previous ice map


The ice in the Bay of Bothnia is melting rapidly.

In the northern Bay of Bothnia there is open water. At Kemi 1 there is a zone of 20-50 cm thick open drift ice.

In the southern Bay of Bothnia the archipelago is ice free. Farther out open water.

Icebreakers: The icebreaking season has ended.

Restrictions to navigation: From today onwards the restrictions are cancelled.

The Saimaa Canal has been opened to traffic.

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


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