Morsowanie (“Walrus swimming” from the Polish word “mors” meaning walrus) has become very popular in Poland in the past few years, and above all in Warsaw. It is a social activity, one to boast about and exchange opinions and good winter swimming places. Most members of the middle class and aspiring middle class have tried winter swimming at least once recently.
There are not too many safe places to go winter swimming in Warsaw (check this list) but Jeziorko Czerniakowskie with a beach in its Southern corner is one of the best-known. With almost 2 km in length and 100-180 meters in width, Jeziorko Czerniakowskie is the biggest natural water reservoir in Warsaw. It’s located in a natural reserve around old Vistula’s riverbed, with lots of animals – 60 species of birds, beavers, etc. Also, there is an educational path that leads you through the place and explains fauna and flora (in Polish).
In the summer, you can also visit the beach for swimming and have a snack at a nearby cafe. It can get quite crowded though, so if you’re looking for a bit of privacy, visit on a weekday. The terrain around Jeziorko is also perfect for a walk – a full circle around Jeziorko takes about 60-75 minutes at a slow pace.