Welcome to the Baltic Sea Ice Service

31.03.2026

In the Bay of Bothnia, there is up to 80 cm thick fast ice along the coasts in the north, in the south there is rotten fast ice. At sea in the north there is very close ice, 20–50 cm thick, in places ridged and rafted. Further south there is open water or ice free. Along the coasts of the Quark and Bothnian Sea, there is rotten fast ice. In the Gulf of Finland, there is rotten fast ice at the northeastern coasts and at sea there is 10–30 cm thick, very close ice in the northeast. In the Gulf of Riga rotten fast ice is present in the northeast with 10–25 cm thick, very close ice further out.