Simplified ice chart and reference charts

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

Normal situation


The ice is drifting southeast in all sea areas.

In the northern Bay of Bothnia 40-55 cm thick fast ice to Kemi 3 and Oulu 2. Farther out, 20-45 cm thick very close ice. The ice field is in places ridged and hard to force. The ice edge is 20 nautical miles west of Bothnia-buoy. Off Raahe, 15-35 cm thick fast ice to Jaakko. Further to Nahkiainen, 15-25 cm thick very close, in places rafted ice. Farther out 20-40 cm thick very close ice. The ice field is in places ridged and hard to force.

In the southern Bay of Bothnia 20-40 cm thick ice in the archipelago. Farther out, 15-40 cm thick, in places ridged, very close ice. Pressure occurs in the ice field, which in places is hard to force. The ice edge runs along the line 30 nautical miles west of Kallan - 70 nautical miles west of Ulkokalla.

In the Quark from Vaasa to Ensten, 15-35 cm thick fast ice. Farther out 5-25 cm thick very close ice to Norra Gloppsten. Farther out, open water.

In the Sea of Bothnia 10-25 cm thick fast ice and thinner level ice in the archipelago.

In the Archipelago Sea in the inner archipelago 10-25 cm thick fast ice and level ice. In the outer archipelago thin level ice. The ice field is rafted in places. Open water in Kihti.

In the western Gulf of Finland 10-30 cm thick fast ice in the inner archipelago. Farther out open water.

In the eastern Gulf of Finland 20-40 cm thick fast ice to Orrengrund and Rankki. Farther out 5-25 cm thick very open ice.

Icebreakers: Kontio, Polaris, Otso, Sisu and Urho assist in the Bay of Bothnia. Zeus assists in the Quark. Voima and Fennica assist in the Gulf of Finland.

Assistance restrictions: Minimum ice class and deadweight required of assisted vessels:
Tornio, Kemi, Oulu, Raahe, Kalajoki, Kokkola and Pietarsaari, IA of more than 4000 tons.
Vaasa, IA of more than 2000 tons.
Kaskinen, IB of more than 2000 tons.
Kristiinankaupunki, Pori, Rauma, Uusikaupunki, Naantali, Turku, Taalintehdas and Förby, I of more than 2000 tons.
Hanko, II of more than 2000 tons.
Koverhar, Lappohja, Inkoo, Kantvik, Helsinki, Sköldvik, Loviisa and Mussalo, I of more than 2000 tons.
Kotka and Hamina, IB of more than 2000 tons.

Vessels bound for Gulf of Bothnia ports in which assistance restrictions apply, shall when passing latitude 60°00' N report their nationality, name, destination, ETA and speed to ICE INFO on VHF channel 78. This report can also be given directly by telephone to +46 10 492 7600.

Vessels bound for a Finnish or Swedish ports in the Quark or in the Bay of Bothnia shall report to Bothnia VTS 20 nautical miles before Nordvalen Lighthouse (63° 32,15' N 20° 46,60' E) on VHF channel 67.

The traffic separation scheme in the Quark is temporarily out of use due to ice conditions.

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


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