Simplified ice chart and reference charts

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

Normal situation


There is brash ice barrier off Oulu.

In the Bay of Bothnia there is 10-30 cm thick ice in the archipelago. Further out there is 5-15 cm thick close ice and ice formation. Off Oulu there is brash ice barrier.

In the Quark and Sea of Bothnia there is new ice in the inner archipelago and ice formation.

In the Gulf of Finland there is thin ice in the innermost Gulf of Vyborg and Gulf of St. Petersburg.

In the Lake Saimaa and Saimaa Canal there is 5-25 cm thick ice.

Icebreakers: Otso assists in the Bay of Bothnia. Protector assists in the northern Lake Saimaa. Meteor assists in the northern and in the central Lake Saimaa. Iso-Pukki assists in the Saimaa Canal and the southern Lake Saimaa.

Restrictions to navigation: Minimum ice class and deadweight required of assisted vessels:
Tornio, Kemi and Oulu, I and II of more than 2000 tons
Lake Saimaa and Saimaa Canal, II of more than 2000 tons.

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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