Baltic Sea water temperature
Baltic Sea, Heiligenhafen · Sea/Coast
The current water temperature at Baltic Sea is 12.9 °C (as of October 15, 2026, source: Copernicus Marine Service).
The sea lags the air by weeks: the warmest water often arrives after the warmest days. Measured buoy values show this honestly.
Measurement series & statistics
This measurement series includes 324 data points since September 28, 2026.
Lowest recorded value: 12.3 °C on October 14, 2026 · highest value: 17.0 °C on October 2, 2026.
In October, temperatures have ranged between 12.3 °C and 17.0 °C.
The current value is 2.3 °C below the October average of this series.
Nearby waters
More measuring points: Baltic Sea
Frequently asked questions
Can you swim at Baltic Sea right now?
The current water temperature is 12.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Baltic Sea?
Currently 12.9 °C (updated continuously).
How warm is at Baltic Sea in October?
In October, the water temperature recently averaged 15.2 °C.
