They’ll be fine. Semi-covered speed skating rinks are not uncommon here. Skaters can deal with a bit of cold, they’re used to it. Heck, while I was freezing my behind off back then, they never seemed bothered at all. But it doesn’t really get that cold outside often anymore, we’ve not had any temperatures like that this winter yet.I hope the skaters will be OK
And it’s rather protected from the wind and rain, too, so unless there just happens to be a westerstorm...