Welcome to the Baltic Sea Ice Service

02.04.2026

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, rafted and at places difficult to force. Further south there is open water or it is ice-free. Along the coasts of the Quark and the northern 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 northeastern Gulf of Riga, there is very close, 10–25 cm thick, drifting ice.