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Nine Mile water temperature
Nine Mile ratings
Quality on a good day: 5.0
Consistency of Surf: 3.0
Difficulty Level: 1.0
Crowds: 4.0

Overall: 3.5

See all 18 ratings

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Nine Mile Water Temperature and Wetsuit Guide

(West Coast South Island, New Zealand)

Today's Nine Mile sea temperature is 12.2 °C.

Statistics for 21 Jul (1981–2005) – mean: 12.7 °C, range: 11.7 °C to 13.8 °C

The Nine Mile water temperature is rather cold (12 °C). Although it will be cloudy today, air temperatures will be relatively mild, feeling like 11 °C, so feeling about the same in the water as out of it. A winter steamer or even a good quality spring wetsuit and neoprene boots should suffice. Wear a hood and gloves if you have not been surfing for a while.

New Zealand Sea Water Temperature

Map of current New Zealand
Surface Water Temperatures
based on measurements from oceanographic satellites
New Zealand Water Temperature Anomaly

Map of current New Zealand
Sea Water Temperature Anomalies

(compared with long term averages
at this time of year)

(click thumbnails to expand)

Below is a graph of Historical Sea Surface Temperature for Nine Mile. This has been derived from analysis of two decades of oceanographic satellite measurements of nearby open water. We have calculated the average water temperature variation around the year as well as the extremes that have been observed on each date.

Nine Mile Water Temperature Graph

All of the graphs for the surf breaks presented on Surf-Forecast.com are on the same scale to enable comparison between locations around the world.

Nine Mile sea temperatures peak in the range 16 to 20°C (61 to 68°F) on around the 12th of February and are at their minimum on about the 20th of August, in the range 11 to 14°C (52 to 57°F). The warmest seasonal sea temperatures at Nine Mile in the second week of February lend themselves to a 4/3mm wetsuit or a 3/2mm suit and 3mm neoprene boots. The minimum sea temperatures at Nine Mile in mid to late August are ideally suited to a 4/3mm wetsuit + 3mm boots, although a 5/3mm wetsuit may be preferable for longer sessions and cold windy days.

Actual sea surface water temperatures close to shore at Nine Mile can vary by several degrees compared with these open water averages. This is especially true after heavy rain, close to river mouths or after long periods of strong offshore winds. Offshore winds cause colder deep water to replace surface water that has been warmed by the sun. Air temperature, wind-chill and sunshine should also be considered before deciding on the kind of wetsuit needed to stay warm when surfing at Nine Mile. Refer to our detailed weather forecasts for this information.