Welcome to the Baltic Sea Ice Service

13.03.2025

In the Bay of Bothnia, there is 20–70 cm thick fast ice in the northern archipelagos and up to 40 cm thick fast ice in the southern archipelagos. At sea in the northeast, there is up to 60 cm thick, very close and partly ridged and rafted ice. The ice field is at places difficult to force. Further out are areas of close, up to 30 cm thick drift ice. Else at sea is new ice or ice formation. In the Quark, there is up to 45 cm thick fast ice in the inner archipelagos and new ice further out. At sea, there is open water and new ice at places. Along the coast of the Sea of Bothnia there is fast ice or thin ice in inner bays but in the southwest, it is mostly ice-free. In the eastern Gulf of Finland, there is 20–35 cm thick fast ice to Kotlin and very open to close ice further west. In the Vyborg Bay, there is up to 30 cm thick fast ice. Along the northern coast, there is fast ice or thin ice. Remnants of very close ice are present in Pärnu Bay.