Baltic Sea water temperature

Baltic Sea, Yyteri (Pori) · Sea/Coast

The current water temperature at Baltic Sea is 17.2 °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.

17.2 °C

Measured: September 1, 2026 · continuously updated

💧 Water 17.2° · ☀️ Air 16.7°

Temperature trend of recent weeks

Baltic Sea — Photo: kallerna · 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: 14.9 °C on July 29, 2026 · highest value: 19.6 °C on July 16, 2026.

Nearby waters

Baltic Sea, Terijoki / Yyterinsannat · 2.4 km away17.2 °C Pyhäjärvi, Säkylä · 62.5 km away17.7 °C Näsijärvi, Kyrönlahti · 108.5 km away17.8 °C Hinjärvi, Närpiö · 124.0 km away16.6 °C Baltic Sea, Naantali · 126.1 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 17.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Baltic Sea?
Currently 17.2 °C (updated continuously).

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

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