Sea temperature in Croatia in May
average across 6 DHMZ stations, 1996-2025 - station averages run from 17.1 to 18.9 °C
| Station | Average | Coldest year | Warmest year | Record low | Record high |
|---|---|---|---|---|---|
| Rovinj-Sv.Ivan n/p | 17.1 °C | 15.1 °C (2019) | 19.7 °C (2018) | 12.5 °C | 23.5 °C |
| Pula | 18.6 °C | 16.3 °C (2019) | 21.7 °C (2018) | 14.2 °C | 25.8 °C |
| Rab | 18.4 °C | 16.4 °C (2019) | 21.3 °C (2018) | 13.2 °C | 25.2 °C |
| Šibenik | 18.9 °C | 17.2 °C (2020) | 21.5 °C (2018) | 13.4 °C | 25.0 °C |
| Split | 18.7 °C | 17.0 °C (2019) | 21.9 °C (2018) | 13.5 °C | 24.8 °C |
| Hvar | 18.4 °C | 17.4 °C (1998) | 21.1 °C (2018) | 14.4 °C | 23.2 °C |
At these stations in May the sea averaged 18.3 °C in 1996-2005 and 18.4 °C in 2016-2025 - essentially unchanged.
These are the readings as the instruments recorded them, not a homogenised climate series: station moves and instrument changes are not corrected for.
← April · Sea temperature in Croatia by month · June →
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/