Baltic Sea water temperature

Baltic Sea, Långholmen (Stockholm) · Sea/Coast

The current water temperature at Baltic Sea is 20.1 °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.

20.1 °C

Measured: September 1, 2026 · continuously updated

💧 Water 20.1° · ☀️ Air 15.3° · high today 20.5°

Temperature trend of recent weeks

Baltic Sea — Photo: Holger.Ellgaard · CC BY-SA 3.0 · Wikimedia Commons

Water quality

EU classification: poor

Measurement series & statistics

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

Lowest recorded value: 19.8 °C on July 28, 2026 · highest value: 23.2 °C on July 17, 2026.

Nearby waters

Tanto, brygga · 1.1 km away18.0 °C Baltic Sea, Tanto, strand 1 · 1.1 km away18.0 °C Marieviksbadet: barnbassäng · 1.2 km away19.0 °C Trekantens strandbad · 1.2 km away19.0 °C Marieviksbadet: lekbassäng · 1.2 km away20.0 °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 20.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Baltic Sea?
Currently 20.1 °C (updated continuously).

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

← All waters