Sea temperature in Croatia in December
average across 6 DHMZ stations, 1996-2025 - station averages run from 13.1 to 16.2 °C
| Station | Average | Coldest year | Warmest year | Record low | Record high |
|---|---|---|---|---|---|
| Rovinj-Sv.Ivan n/p | 13.8 °C | 12.5 °C (2001) | 15.3 °C (2014) | 10.4 °C | 16.7 °C |
| Pula | 13.5 °C | 12.0 °C (2001) | 15.1 °C (2000) | 10.3 °C | 16.8 °C |
| Rab | 13.1 °C | 10.4 °C (2001) | 14.8 °C (2014) | 8.0 °C | 16.6 °C |
| Šibenik | 15.6 °C | 14.0 °C (1996) | 17.5 °C (2015) | 11.3 °C | 19.0 °C |
| Split | 14.8 °C | 12.7 °C (2007) | 16.6 °C (2015) | 11.0 °C | 18.0 °C |
| Hvar | 16.2 °C | 14.3 °C (1998) | 17.6 °C (2015) | 13.0 °C | 19.0 °C |
At these stations in December the sea averaged 13.9 °C in 1996-2005 and 14.9 °C in 2016-2025 - 1.0 °C warmer.
These are the readings as the instruments recorded them, not a homogenised climate series: station moves and instrument changes are not corrected for.
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How this is measured
Daily sea-surface observations at the 14:00 term, averaged over 1996-2025. A station appears here only when at least 20 of those years carry a full month of readings; stations with a shorter series are left out rather than averaged into a normal they cannot support. The Croatia-wide figure is the unweighted mean of the stations shown, not a coastline average.
Source: DHMZ — Državni hidrometeorološki zavod, archive data supplied on request. https://meteo.hr/