Baltic Sea water temperature

Baltic Sea, Balka Strand (Bornholm) · Sea/Coast

The current water temperature at Baltic Sea is 18.2 °C (as of September 1, 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.

18.2 °C

Measured: September 1, 2026 · continuously updated

💧 Water 18.2° · ☀️ Air 16.6° · high today 18.5°

Temperature trend of recent weeks

Baltic Sea — Photo: 7alaskan · CC BY-SA 3.0 · Wikimedia Commons

Water quality

EU classification: excellent

Measurement series & statistics

This measurement series includes 589 data points since July 3, 2026.

Lowest recorded value: 14.7 °C on July 8, 2026 · highest value: 20.1 °C on July 17, 2026.

Nearby waters

Baltic Sea, Dueodde (Bornholm) · 7.1 km away18.4 °C Baltic Sea, Mälarhusen · 69.5 km away15.0 °C Baltic Sea, Kyhl, Borrby strand · 70.4 km away15.0 °C Baltic Sea, Tobisvik, Stranden · 75.5 km away16.6 °C Baltic Sea, Baskemölla · 79.4 km away18.0 °C

More measuring points: Baltic Sea

Färjestaden, Granudden/Talludd22.0 °C Hägernäsbadet22.0 °C Näsaängsbadet22.0 °C Eriksöre camping, Eriksöre21.0 °C Nickstabadet21.0 °C Saxnäs21.0 °C

Frequently asked questions

Can you swim at Baltic Sea right now?
The current water temperature is 18.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Baltic Sea?
Currently 18.2 °C (updated continuously).

How is the water quality at Baltic Sea?
The official classification is: excellent.

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