Baltic Sea water temperature
Baltic Sea, Smygehuk · Sea/Coast
The current water temperature at Baltic Sea is 15.2 °C (as of September 20, 2026, source: Open-Meteo marine model).
The sea lags the air by weeks: the warmest water often arrives after the warmest days. Measured buoy values show this honestly.
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Measurement series & statistics
This measurement series includes 609 data points since July 22, 2026.
Lowest recorded value: 13.7 °C on July 28, 2026 · highest value: 17.2 °C on August 3, 2026.
In September, temperatures have ranged between 14.8 °C and 17.2 °C.
The current value is 0.4 °C below the September 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 15.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Baltic Sea?
Currently 15.2 °C (updated continuously).
How warm is at Baltic Sea in September?
In September, the water temperature recently averaged 15.6 °C.
When is the water warmest at Baltic Sea?
Across the measurement record, August is on average the warmest month (15.9 °C).
