Kattegat water temperature
Kattegat, Marstrand · Sea/Coast
The current water temperature at Kattegat is 15.3 °C (as of September 20, 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.
Measurement series & statistics
This measurement series includes 602 data points since July 22, 2026.
Lowest recorded value: 15.0 °C on September 19, 2026 · highest value: 19.9 °C on July 23, 2026.
In September, temperatures have ranged between 15.0 °C and 18.5 °C.
The current value is 1.7 °C below the September average of this series.
Nearby waters
More measuring points: Kattegat
Frequently asked questions
Can you swim at Kattegat right now?
The current water temperature is 15.3 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Kattegat?
Currently 15.3 °C (updated continuously).
How warm is at Kattegat in September?
In September, the water temperature recently averaged 17.0 °C.
When is the water warmest at Kattegat?
Across the measurement record, July is on average the warmest month (19.0 °C).
