Ice conditions

Would you like to participate in the improvement of the Ice Chart?

By answering to this user survey, you can give us feedback to develop the Ice Chart according to your needs and wishes. It will only take about 5-10 minutes. 

Thank you for answering!

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

Normal situation

FINNISH ICE REPORT 02.05.2016

The ice condition is virtually unchanged.

In the northern Bay of Bothnia there is 20-60 cm thick rotten ice in the archipelago. Farther out there is mainly open water to approximately 15 nautical miles west of Merikallat and Nahkiainen. In the vicinity of Kemi 1 there are large thick ice floes which have broken off the fast ice. Farther west there is 20-60 cm thick ridged ice with varying concentration approximately to the line Simpgrundet - Ulkokalla.

The Southern Bay of Bothnia is ice-free.

The northern Lake Saimaa is ice-free.

Icebreakers: Kontio and Otso assist in the northern Bay of Bothnia.

Alterations to the restrictions: From today onwards minimum ice class and deadweight required of assisted vessels:
Tornio, Kemi and Oulu, IA and IB of more than 2000 tons.
Raahe, I and II of more than 2000 tons.

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

Vessels bound for Gulf of Bothnia ports in which traffic restrictions apply shall, when passing Svenska Björn, report their nationality, name, port of destination, ETA and speed to ICE INFO on VHF channel 84. This report can also be given directly by phone +46 31 699 100.

The reference map can be changed by clicking on the links above the images. The different maps show the average (= normal) ice conditions (1965-1986) for the period in question, the ice chart of the preceeding week, the corresponding ice chart for the previous year, and the current location of Finnish icebreakers.

The Baltic Sea Now pages display a simplified map of the sea areas by Finland. This map is updated weekly, by Tuesday morning at the latest. The map shows the areas covered by ice and the thickness of smooth ice in these areas. In addition, the map includes isometric displays of temperature gradients by area.

When the Baltic is not covered by ice, the maps show the surface water temperatures in the sea areas and the corresponding temperatures from the previous year. During ice-free periods, the maps are updated irregularly.

More information

Explanation of map's finnish words

  • jäätä: ice
  • vettä: water
  • normaalitilanne: normal situation
  • ahtauma: ice ridge
  • haurasta: rotten ice