Cairns Sea Temperature (Today) 18th Apr 2018 27.8°C / 82°F Current weather (shower rain) 27°C / 81°F Partly cloudy Wind 11 mph Humidity 83% The measurements for the water temperature in Cairns, Queensland are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is … Continue reading Sea Temperature.