Today's St Jean sea temperature is 21.7 °C
(2.0°C warmer than normal for this time of year)
| Mean: | 19.7 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Range: | 17.3 °C to 23.8 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statistics for 21 Jun (1981–2005) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Today, many surfers would wear a summer wetsuit.
A hot sunny day, feeling like 31 °C even after we account for wind, and warm water temperature (21 °C) too at St Jean. Surfers may need a thin summer wetsuit or at least a rash vest to block the UV. Otherwise, warm enough for just board shorts.
 Map of current France Surface Water Temperatures (based on measurements from oceanographic satellites) |  Map of current France 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 St Jean. 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.
St Jean water temperatures peak in the range 20 to 26°C (68 to 79°F) on around the 14th of August and are at their minimum on about the 1st of March, in the range 12 to 13°C (54 to 55°F). St Jean water temperatures are always warm reach their highest in mid August. You'll need a 2mm neoprene top or a shorty at dawn/dusk or if it's windy. The minimum water temperatures at St Jean at the beginning of March 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 St Jean 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 St Jean. Refer to our detailed weather forecasts for this information.
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