Sweden is a trip skater’s icy dream; crisp, cold winters and a plain ridiculous amount of lakes (almost 100,000) and rivers, many of which freeze over in a mirror of natural ice in wintertime. Sweden’s coastline is also peppered with archipelagoes and teeming with islands.
If you are doomed to visit icy cold Sweden in winter then make time in your schedule to go skating. You can rent skates at several places or buy them relatively cheaply in sport stores.
Here is some more info from the Swedish tourist bureau.