Saint-Cast-le-Guildo Sea Temperature
29°C / 84°F
The measurements for the water temperature in Saint-Cast-le-Guildo, Brittany are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.
Monthly average water temp
Monthly average max / min water temperatures
The graph below shows the range of monthly Saint-Cast-le-Guildo water temperature derived from many years of historical sea surface temperature data.
The warmest water temperature is in September with an average around 64.2°F / 17.9°C. The coldest month is February with an average water temperature of 48.2°F / 9.0°C.
7 day tide forecast for Saint-Cast-le-Guildo
*These tide times are estimates based on the nearest accurate location (Saint Servan, France) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.