Poland — Water Temperature in Seas, Lakes and Rivers
Check today’s water temperatures across Poland, including seas, lakes, and rivers. View real-time updates and seasonal ranges for both coastal and inland waters. We find every place where you can swim and show you the water temperature there today and throughout the year.
Sea Water Temperature Along the Coast
Chart of Average Temperature Changes Over the Last 60 Days
Places with the Warmest Sea Water Today
The Most Popular Seaside Places
Coastal Seas and Oceans
Water Temperature in Lakes and Rivers
Popular Lakes
Popular Rivers
Popular Places
Water Temperature and Swimming Overview
Regions and Map
- Greater Poland Voivodeship
- Kuyavian-Pomeranian Voivodeship
- Lesser Poland Voivodeship
- Lower Silesian Voivodeship
- Lublin Voivodeship
- Lubusz Voivodeship
- Łódź Voivodeship
- Masovian Voivodeship
- Opole Voivodeship
- Podlaskie Voivodeship
- Pomeranian Voivodeship
- Silesian Voivodeship
- Subcarpathian Voivodeship
- Świętokrzyskie Voivodeship
- Warmian–Masurian Voivodeship
- West Pomeranian Voivodeship
Water Temperature Trends
Poland’s Baltic Sea coast tends to be cooler than many popular seaside destinations. Sea surface temperatures typically range from close to freezing in winter, around 0–4 °C (32–39 °F), to about 17–20 °C (63–68 °F) in a normal summer, with sheltered bays and particularly warm summers occasionally reaching the low 20s °C (around 70–75 °F). Spring and autumn are transitional, with waters often between 5–12 °C (41–54 °F). Because the Baltic is shallow and brackish it warms and cools relatively quickly, but even in summer the water feels chilly compared with southern seas. Swimming is widely permitted and popular during the official bathing season—generally late spring through August—with lifeguarded beaches and marked bathing zones providing the safest places to swim. Beaches may be temporarily closed or access restricted for safety or water-quality reasons, including high bacteria counts, jellyfish or storm conditions.
Swimming Conditions
Inland lakes and rivers offer more varied and often warmer swimming opportunities. The many lakes in regions such as Masuria commonly reach 18–25 °C (64–77 °F) in summer, and small shallow ponds can warm to the upper 20s °C (around 80–82 °F) on hot years. Rivers vary by depth and flow: slower, shallower stretches warm up to similar summer levels, while deeper or fast-flowing sections stay cooler. Swimming is generally allowed in designated spots, but local advisories may close areas because of pollution, algal blooms (cyanobacteria), or strong currents. Observing signage, using lifeguarded sites, and being mindful of temperature-related risks such as cold shock and hypothermia will make swimming in Poland safer and more enjoyable.