Nine Mile Reef Water Temperature and Wetsuit Guide

The water temperature (18 °C / 66 °F) at Nine Mile Reef is relatively warm. If the sun does come out as forecast, it should feel warm enough to surf in a summer wetsuit. Effective air temperature of 19 °C / 66 °F.

Map of current South Africa Surface Water Temperatures based on measurements from oceanographic satellites

Map of current South Africa 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 Reef. 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.

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 Reef sea temperatures peak in the range 19 to 23°C (66 to 73°F) on around the 29th of January and are at their minimum on about the 14th of July, in the range 14 to 16°C (57 to 61°F). Nine Mile Reef sea temperatures are maximum in late January. Surfers should use a 2mm long sleeve shorty or a 3/2mm spring wetsuit if the wind is up. The minimum seasonal sea temperatures at Nine Mile Reef in mid July lend themselves to a 4/3mm wetsuit or a 3/2mm suit and 3mm neoprene boots.

Actual sea surface water temperatures close to shore at Nine Mile Reef 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 Reef. Refer to our detailed weather forecasts for this information.

Latest surface water temperature for the entire globe. Click the image to view a larger version.