Welcome to the Baltic Sea Ice Services
In the Bay of Bothnia the archipelagos are covered with 20-65 cm thick fast ice. Farther off there is consolidated and ridged, 20-60 cm thick ice approximately to the line Skellefteå – Norströmsgrund – Marjaniemi. The ice is locally difficult to force and there is a jammed brash barrier at its edge. Farther south there is mostly open water at sea.
In the archipelagos of Norra Kvarken there is 20-40 cm thick fast ice. Farther out there is close to very close 10-40 cm thick ice with a jammed brash barrier in the west, else mostly open water with some stripes of ice drifting in northwesterly direction starting at Vaasa archipelaga and Holmöarna.
In the Sea of Bothnia and the Archipelago Sea 10-30 cm thick fast ice and thin level ice is present in the archipelagos.
In the Gulf of Finland the northern archipelagos are covered with 10-40 cm thick fast ice. Farther out there is a narrow zone with very close to close 10-30 cm thick ice. North of the line Haapasaari – Kotlin very close 15-35 cm thick ice is present at sea.
In the Gulf of Riga the Pärnu Bay and the Moonsund are covered with 15-30 cm thick fast ice or very close drift ice.