How cold is New Zealand water in autumn? In October sea water temperature throughout New Zealand is not yet warm enough for swimming and does not exceed 20°C. Based on average water temperature observations over the past ten years, the warmest sea in New Zealand in October was 16°C (in Poor Knights Islands), and the coldest water 11°C (in Kaka Point). To find out the sea temperature today and in the coming days, go to Current sea temperature in New Zealand
New Zealand cities and resorts with the values of the average water temperature in October in recent years.
For more detailed information about water temperature, surf forecast, weather and time of sunrise and sunset in any specific area of your interest, just click on a city name. For ease of search, all places are also grouped by the first letter of the name.
To find out what the water temperature was in New Zealand any day over a period of the last ten years, select the month