FMI Sea Ice Outlook for the Baltic Sea

FMI Forecast Chart 1 - March


    End of March

  • In the central parts of Bay of Bothnia, ridged very close ice, 30-70 cm thick. Coastal fast-ice is 20–60 cm thick.
  • In the archipelagoes of the Quark, 20–50 cm thick ice.
  • In the Sea of Bothnia, 15-35 cm thick ice along the coasts, starting to show signs of melting.
  • In the Turku archipelago, the ice has started to rot and in the Stockholm archipelago the ice has already melted.
  • In the Northern Baltic Proper, water temperatures are above 2°C.
  • In the western part of the Gulf of Finland, the coastal ice is rotten; off-shore water temperatures are around 1°C.
  • In the eastern Gulf of Finland, the coastal fast ice is 20–40 cm thick. In the central basin there is rotting drift ice, 10-30 cm thick.
FMI Forecast Chart 2 - April


    End of April

  • The ice field in the central Bay of Bothnia is ridged and the ice is 10-50 cm thick. The drift ice has drifted to the waters off Kokkola and Kalajoki. The coastal fast-ice in the norhtern parts is 30-60 cm thick.
  • The coastal ice in the Southern Bay of Bothnia are rotten.
  • Elsewhere the ice has melted.
Next update to the forecast will be issued in November 2022.
Contact: Finnish Meteorological Institute, Ice Service - FMI Logo