Normally, the Baltic is Frozen this time of year
Normally this time of year, the northern section of the Baltic Sea (the Gulf of Bothnia) and the Gulf of Finland have a lot of ice cover, similar to the above, if not completely covered.
This year, both bodies of water are almost completely ice-free.
Meanwhile, last year it was Hudson Bay in northern Canada that was near ice-free until much later in winter than usual. This year, Hudson Bay is close to normal.