(in demonstration phase)

FMI Sea Ice Outlook for the Baltic Sea

baltic sea ice and water temperature 30 January 2021
 
  • In the northern Bay of Bothnia there is 30-55 cm thick ice. In central parts 10–50 cm thick ice.
  • In the Vaasa archipelago 5-35 cm thick ice.
  • Thin ice in the Quark.
  • Along the coasts of the Sea of Bothnia, 5-30 cm thick ice.
  • In the sheltered archipelago of the western Gulf of Finland there is 5-20 cm thick ice.
  • In the central Sea of Bothnia and central parts of the western Gulf of Finland, water temperatures are in the range 1°–3°C.
  • In the Northern Baltic Proper, water temperature is over 3°C.
  • In the eastern Gulf of Finland, 10–40 cm thick fast ice, and 10–35 cm thick ice in central parts.
 
 
baltic sea ice and water temperature 28 February 2021
 
  • The ice field in the northern Bay of Bothnia is ridged. Ice thickness of coastal ice is 40-70 cm, off-shore 30-65 cm. In southern parts 20-45 and 5-30 cm, respectively.
  • The Quark and the Vaasa archipelago are ice-covered. The ice thickness in the archipelago is 20-40 cm, in the open sea 5-20 cm.
  • Along the coast of the Sea of Bothnia there is 10-40 cm thick ice and the off-shore water temperature is below 3°C.
  • In the Archipelago Sea there is 10-25 cm thick ice.
  • In the Northern Baltic Proper, water temperatures are over 2°C.
  • In the archipelago of the western Gulf of Finland there is 10-30 cm thick ice. Off-shore water temperatures are around 2°C.
  • Along the coasts of the eastern Gulf of Finland there is 20-45 cm thick ice; off-shore the drift ice is 5-30 cm thick.
 
 
baltic sea ice and water temperature 31 March 2021
 
  • The ice field in the central Bay of Bothnia is ridged and the ice is 20 to 70 cm thick. The fast-ice thickness also varies from 20 to 70 cm.
  • In the Vaasa archipelago, the ice is 10-35 cm thick. In the Quark there is open water.
  • In the Sea of Bothnia the ice has started to rot.
  • In the Turku archipelago, the ice has almost melted away; off-shore water temperatures are above 1°C.
  • 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 above 2°C.
  • In the eastern Gulf of Finland the coastal fast ice is 10–40 cm thick. In the central basin there is rotting drift ice, 10-30 cm thick.
 
 
An update to the forecast is being issued in beginning of March.


Contact: Finnish Meteorological Institute, Ice Service
iceservice@fmi.fi
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