Although it is already possible to skate on laps such as in Doorn, it is almost certainly not possible this week on large puddles or waterways, says a meteorologist from Weeronline. With temperatures dropping locally to -9 degrees Celsius, it was the coldest night of the year, but that cold does not last long enough to skate responsibly on open water. “To open ice rinks on a large scale, you need a few days of severe frost.” From the night from Saturday to Sunday, the cold is over and the thaw sets in.