Baltic Sea water temperatures: Where it's worth jumping into the water now!

Baltic Sea water temperatures: Where it's worth jumping into the water now!

The water temperatures of the Baltic Sea are currently being discussed again in Mecklenburg-Western Pomerania. The figures from October 5, 2025 show that the Baltic Sea is very popular with locals and tourists, with a temperature that is updated daily. According to the Baltic Sea newspaper Swimmers can query the exact water temperature at 22 different water gauge stations, which is measured at five times: 8 a.m., 11 a.m., 2 p.m., 5 p.m. and 8 p.m.

The interactive map offers an easy way to find out about water temperatures in places like Kühlungsborn, Warnemünde and Heringsdorf. Swimming in the Baltic Sea is a great pleasure, especially in summer; Even in winter, some diehards venture into the water. The water temperature remains a crucial criterion.

Current trends in water temperatures

According to the Federal Maritime and Hydrographic Agency, the warming of the North and Baltic Seas is clearly noticeable. In 2024, the average water temperature in the Baltic Sea was 9.6 degrees, more than 1 degree above the long-term average. This makes last year the second warmest since data collection began. Values ​​of 12.1 degrees were even measured for the North Sea, which is a high since 1969. These figures were presented in the report by World summarized.

What is particularly interesting is that measurements since the 1990s show that the Baltic Sea is warming faster than the North Sea. One reason for this is that the Baltic Sea is an inland sea and has less exchange with other bodies of water. This means that the temperature increases associated with climate change have a greater impact here, as the evaluations by NDR prove.

Consequences for marine flora and fauna

Warming not only has an impact on bathing pleasure, but also on the flora and fauna of the sea. For example, increased temperature means that warm water can absorb less oxygen, which worsens living conditions for many marine organisms. In addition, water temperatures promote the growth of mini algae blooms, which reduce light to deeper water layers and thus endanger important food sources. These developments are worrying because many species, such as herring, are spawning earlier but fewer offspring survive due to lack of food.

In summary, it can be said that the Baltic Sea and North Sea are suffering from the consequences of climate change. While the water temperatures encourage many to swim, the long-term impacts on the marine environment and therefore on the fishing industry and biodiversity cannot be ignored. Therefore, measures to reduce greenhouse gas emissions must be taken to protect the natural habitats of these valuable ecosystems.