Welcome to the Baltic Sea Ice Service

30.12.2025

In the northern Bay of Bothnia, there is up to 25 cm thick fast ice as well as thin level ice in the northern archipelagos. Further out in the east, there is very open to close, 5-15cm thick drift ice. In the southern Bay of Bothnia as well as the Quark and the Swedish coast of the northern Bothnian Sea, there is thin ice in some sheltered places along the coast. In the Archipelago Sea and the northeastern Gulf of Finland, there is new ice at places.