Simplified ice chart and reference charts

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

Ice map of the previous year


Ice is gradually forming along the coast.

In the northern Bay of Bothnia new ice in the archipelago.

In the Lake Saimaa 5-10 cm thick ice in the eastern parts. Elsewhere in the northern Lake Saimaa 1-5 cm thick new ice. In The Saimaa Canal new ice formation.

Icebreakers: Meteor assists in the northern Lake Saimaa.

Assistance restrictions: Minimum ice class and deadweight required of assisted vessels:
Varkaus, Kuopio, Siilinjärvi, Puhos and Joensuu, II of more than 1300 tons.

The next ice report will be published on Monday 17th December.

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
  • vettä: water
  • haurasta: rotten ice


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