Winter swimming
（重定向自Ice swimming）
![Ice swimming in Finland](/Images/godic/202501/19/Icehole0741.jpg")
![Two Russian women prepare to swim in a frozen lake.](/Images/godic/202501/19/Winter_Russia_bikini0741.JPG")
![An ice hole is cut in the form of a cross in Russia to celebrate the Epiphany](/Images/godic/202501/19/RIAN_archive_550903_Epiphany_celebration_in_Maritime_Territory0741.jpg")
![Professor Sugarman, the](/Images/godic/202501/19/Professor_Sugarman_Postcard_Little_Falls_New_York0741.jpg")
Winter swimming is the activity of swimming during the winter season, typically in outdoor locations (open water swimming) or in unheated pools or lidos. In colder countries it may be synonymous with ice swimming, when the water is frozen over. This requires either breaking the ice or entering where a spring prevents the formation of ice. It may also be simulated by a pool of water at 0 °C (32 °F), the temperature at which water freezes.