Croatia is a beautiful country with a lot to offer tourists, and one of the best things about it is that there are plenty of beaches to enjoy, even in winter. While the Mediterranean Sea is too cold for swimming in winter, the Adriatic Sea remains relatively warm.

Swimming in the Adriatic Sea in Croatia during the winter (December to February) is possible but only for the very brave or those with a thick wetsuit. The water temperature typically drops to between 12°C and 14°C (53°F–57°F), which is cold enough to cause cold shock in most people. However, in cities like Split, you will still see locals playing "Picigin" (a traditional ball game) in the shallow waters of Bačvice Beach year-round to maintain tradition. If you want a more comfortable winter swim in 2026, many luxury hotels in Dubrovnik, Opatija, and Rovinj offer heated indoor seawater pools with views of the coast. Additionally, Croatia is home to several geothermal spas and thermal parks, such as Tuheljske Toplice near Zagreb, where you can swim in naturally warm mineral waters even when there is snow on the ground. For the average tourist, a winter visit to Croatia is better spent enjoying the festive Christmas markets and hiking the Plitvice Lakes without the summer heat.