Today's St Jean de Monts sea temperature is 23.2 °C
(5.0°C warmer than normal for this time of year)
| Mean: | 18.2 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Range: | 16.7 °C to 19.7 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statistics for 29 Jun (1981–2005) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Today, many surfers would wear a shorty .
The water temperature (23 °C) at St Jean de Monts is warm and the air temperature should feel similar (windchill forecast 17 °C). If the sun does come out as forecast, it should feel warm enough to surf in a shorty or a summer wetsuit.
 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 de Monts. 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 de Monts sea water temperatures peak in the range 18 to 23°C (64 to 73°F) on around the 10th of August and are at their coldest on about the 1st of March, in the range 10 to 11°C (50 to 52°F). St Jean de Monts sea water temperatures are warmest in early to mid August. Surfers should use a 2mm long sleeve shorty or a 3/2mm spring wetsuit if the wind is up. At its coldest at the beginning of March, low sea water temperatures at St Jean de Monts are suited to a 5/4mm or 5/3mm good quality wetsuit with neoprene gloves and 3mm boots. You will need a hood if it's windy or the air is cold.
Actual sea surface water temperatures close to shore at St Jean de Monts 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 de Monts. Refer to our detailed weather forecasts for this information.
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