Lake

Reifinger See, Grassau

Data Source Estimated ±2°C

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Global (calibrated on 476 French temperate lakes, 42-51°N)

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Europe/Berlin

Right Now

11.4°C

Lake · Europe/Berlin ±2°C

Data Source

Lake Thermal (France-calibrated)

Lake surface temperature estimated using the Prats & Danis (2019) exponential smoothing model. Captures thermal inertia — lakes respond slowly to air temperature changes. Parameters computed from published equations using actual latitude and altitude (Copernicus DEM), with default assumptions for depth and size.

View research paper

Updated 0 sec ago

7-Day Trend

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±2°C

All estimates use air temperature from Open-Meteo. Actual temperatures depend on depth, shade, inflows, and local conditions. Treat as guides, not measurements.

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Frequently asked questions

What temperature is safe for wild swimming?

Most swimmers find 15°C+ comfortable. Below 10°C requires acclimatisation. Always limit time in cold water.

How accurate is the temperature data?

We combine satellite sea surface data with community reports. Actual conditions may vary by depth and location.