Welcome to the Baltic Sea Ice Service

27.03.2026

In the Bay of Bothnia, there is fast ice along the coasts, up to 80 cm thick in the north and up to 40 cm thick in the south. At sea in the north there is very close ice, 20–50 cm thick, in places ridged and rafted. In the south there is open water. In the Quark there is open water at sea, at the coasts there is up to 40 cm thick rotten fast ice. Along the coasts of the Bothnian Sea, there is up to 40 cm thick rotten fast ice. In the Gulf of Finland, there is up to 40 cm thick rotten fast ice at the coasts. At sea there is 10–30 cm thick, very close ice in the northeast. In the Gulf of Riga up to 35 cm thick rotten fast ice is present in the northeast. At sea, there is 10–25 cm thick, very close ice in the north. In the Curonian Lagoon and the Mälaren there are still ice remnants.