Hanko Sea Temperature
20°C / 69°F
The measurements for the water temperature in Hanko, Southern Finland Province are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.
Monthly average water temp
Monthly average max / min water temperatures
The graph below shows the range of monthly Hanko water temperature derived from many years of historical sea surface temperature data.