Welcome to the Baltic Sea Ice Services
Inner archipelagos of the Bay of Bothnia between Piteå and Oulu are covered with
up to 25 cm thick fast ice. In the outer archipelagos there is very close to very open
5-20 cm thick ice, which is rapidly drifting southwards.
Thin ice is present also in the inner archipelagos of Vaasa, in some
shallow and sheltered bays of the Sea of Bothnia, in the inner Vyborg Bay and in
the easternmost Gulf of Finland.