Simplified ice chart and reference charts

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

Ice map of the previous year


The ice in the Northern Bay of Bothnia is drifting south.

In the northern Bay of Bothnia off Tornio and Kemi 20-40 cm thick fast ice to Europa and Inakari. Farther out 15-30 cm thick very close ice to Kemi 3 and thin drift ice and new ice to Kemi 2. From Oulu to Kattilankalla 15-35 cm thick fast ice. Farther out first 10-20 cm thick open ice to Oulu 3, then open water.

In the southern Bay of Bothnia and in the Quark thin ice in the inner archipelago.

In the northern Lake Saimaa 5-20 cm thick fast ice. In the southern Lake Saimaa and in the Saimaa Canal thin drift ice in places.

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

Assistance restrictions: Minimum ice class and deadweight required of assisted vessels:
Tornio, Kemi and Oulu, I of more than 2000 tons.
Raahe, Kalajoki, Kokkola and Pietarsaari, II of more than 2000 tons.
Lake Saimaa and Saimaa Canal, II of more than 2000 tons.

Vessels bound for Gulf of Bothnia ports in which assistance 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 10 492 7600.

Vessels bound for a Finnish or Swedish port in the Quark or the Bay of Bothnia shall report to Bothnia VTS 20 nautical miles before Nordvalen Lighthouse on VHF channel 67.

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 assistance 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.

 Products are generated using E.U. Copernicus Marine Service Information.CMEMS_logo

Explanation of chart's Finnish words

  • jäätä: ice
  • vettä: water
  • haurasta: rotten ice


More Information