Kattegat water temperature

Kattegat, Marstrand · Sea/Coast

The current water temperature at Kattegat is 18.4 °C (as of August 31, 2026, source: official monitoring networks).

The sea lags the air by weeks: the warmest water often arrives after the warmest days. Measured buoy values show this honestly.

18.4 °C

Measured: August 31, 2026 · continuously updated

💧 Water 18.4° · ☀️ Air 16.1°

Temperature trend of recent weeks

Measurement series & statistics

This measurement series includes 584 data points since July 3, 2026.

Lowest recorded value: 16.9 °C on July 9, 2026 · highest value: 22.8 °C on July 17, 2026.

Nearby waters

Kattegat, Hönö, Lapposand · 21.7 km away20.0 °C Kattegat, Hönö, Hästen · 22.6 km away20.0 °C Kattegat, Krossholmen · 24.3 km away18.2 °C Kattegat, Vinga · 28.2 km away18.0 °C Kattegat, Tångudden · 28.4 km away18.1 °C

More measuring points: Kattegat

Arild, Kallbadhuset20.0 °C Farhultsbaden20.0 °C Hönö, Hästen20.0 °C Hönö, Lapposand20.0 °C Laholmsbukten, Birger Pers väg20.0 °C Laholmsbukten, Fiskaregatan20.0 °C

Frequently asked questions

Can you swim at Kattegat right now?
The current water temperature is 18.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Kattegat?
Currently 18.4 °C (updated continuously).

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