4 brave girls was iceswimming 21.1.2017 in Oulu River,

Tuira swimming place (Tuiran uimaranta in finnish)

temperature outside about -5° C and water temperature a little bit over zero.

Swimming place is found https://goo.gl/maps/pYe1wsyLJnR2

Milema is from Brazil (left side person), Ulla, another Ulla and Paula are from Finland

You also should try iceswimming, its healty and very refreshing... and fun, too ;-)