Today's Kosi Bay sea temperature is 24.6 °C
(1.3°C warmer than normal for this time of year)
| Mean: | 23.3 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Range: | 22.6 °C to 24.1 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statistics for 09 Jun (1981–2005) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Today, many surfers would wear a shorty .
Sunny with pleasantly warm air temperatures (feeling like 21 °C once we account for wind), and similar sea temperatures (24 °C). Wear boardshorts or a shorty, or better still a thin summer wetsuit to keep the UV off.
 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 Kosi Bay. 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.
Kosi Bay sea water temperatures peak in the range 26 to 28°C (79 to 82°F) on around the 4th of February and are at their coldest on about the 1st of August, in the range 21 to 23°C (70 to 73°F). Year round warm sea water temperatures at Kosi Bay climb to their maximum in early February. Even then a rash vest and board shorts should be fine for surfing at any time of year. Kosi Bay sea water temperatures are always warm but dip to their coldest at the beginning of August. You'll need a 2mm neoprene top or a shorty at dawn/dusk or if it's windy.
Actual sea surface water temperatures close to shore at Kosi Bay 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 Kosi Bay. Refer to our detailed weather forecasts for this information.
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