The most detailed information about the water temperature in Saint-Cast-le-Guildo in Celtic Sea (Brittany, France). Forecast of changes in water temperature for the next 10 days. Statistics by months for recent years. Information about the neighboring resorts. Weather forecast in Saint-Cast-le-Guildo for a week.
Water temperature in Saint-Cast-le-Guildo right now
data updated 3 minutes ago52°F
yesterday: 52°F
a week ago: 51°F
Trend: stability
Today water temperature in Saint-Cast-le-Guildo is 52.9°F. In general, this water temperature is unacceptable for swimming. But hardened people can afford to be in such water for 5-10 minutes. In any case, the general weather is also important. So, the air temperature at the same time will reach 48°F.
Analysis and forecast
The water temperature today roughly corresponds to the average value on this day in recent years. Its value has rise both over the past 20 days and over the past week. Exactly a year ago, on this day, the water temperature in this location was 51°F. Water temperature range in Saint-Cast-le-Guildo in April is from 48 to 55 degrees.
According to our forecast, in the next 5-6 days the water temperature in Saint-Cast-le-Guildo will become lower than today, but in 10 days it will still slightly rise, its value will be 54°F.
Table of water temperature values in Saint-Cast-le-Guildo
| Day | Fact* | Average** | Forecast*** |
| Apr 18 | 11.2°C | 10.5°C | |
| Apr 19 | 11.2°C | 10.5°C | |
| Apr 20 | 11.3°C | 10.3°C | |
| Apr 21 | 11.5°C | 10.5°C | |
| Apr 22 | 11.7°C | 11.0°C | |
| Apr 23 | 11.8°C | 11.5°C | |
| Apr 24 | 11.6°C | 11.0°C | |
| Apr 25 | 11.6°C | 11.3°C | |
| Apr 26 | 10.8°C | 11.1°C | |
| Apr 27 | 11.3°C | 11.6°C | |
| Apr 28 | 11.8°C | 12.1°C | |
| Apr 29 | 11.8°C | 12.1°C | |
| Apr 30 | 10.8°C | 11.1°C | |
| May 1 | 11.3°C | 11.6°C | |
| May 2 | 11.0°C | 11.3°C |
** Average - Average water temperature on this day in past years
*** Forecast - Our forecast for the water temperature
Actual nearshore temperatures may vary by several degrees from the indicated values. This is noticeable after heavy rain or after prolonged periods of strong winds. Some downstream winds cause cold, deep waters to replace surface waters that have been warmed by the sun.
To develop a forecast, we use our own mathematical model, which takes into account the current change in water temperature, historical data and the main weather trends, wind strength and direction, air temperature in each specific region. We also take into account data for other resorts in France.
Annual graph of average water temperature change in Saint-Cast-le-Guildo
Water temperature in Saint-Cast-le-Guildo by month
Saint-Cast-le-Guildo located in the northern hemisphere, at latitude 48 degrees. The water in this location never warms up to comfortable values. Average annual water temperature on the coast in Saint-Cast-le-Guildo is 56°F, by the seasons: in winter 50°F, in spring 51°F, in summer 61°F, in autumn 61°F. Minimum water temperature (45°F) in Saint-Cast-le-Guildo it happens in January, maximum (66°F) in September.
You can find out detailed data on how the water temperature in Saint-Cast-le-Guildo changes in each specific month:
Saint-Cast-le-Guildo: general information and map
Neighboring cities and resorts
| City | Water* | Distance** |
| Plevenon | 52°C | 4km |
| Pleboulle | 52°C  | 6km |
| Saint-Jacut-de-la-Mer | 52°C | 6km |
| Lancieux | 53°C | 8km |
| Cap Frehel | 52°C | 8km |
| Saint-Briac-sur-Mer | 52°C | 9km |
| Saint-Lunaire | 52°C | 11km |
| Dinard | 53°C | 14km |
| Erquy | 51°C | 15km |
| La Richardais | 52°C | 17km |
| Saint-Malo | 52°C | 18km |
| Le Minihic-sur-Rance | 52°C | 19km |
** Straight line distance in kilometers
The warmest water today in France recorded in Rogliano, its value is 60°F. Lowest - in Meillerie, there water temperature now 48°F. Average water temperature in the country today - 55°F.
Water temperature data in Saint-Cast-le-Guildo and neighboring towns and resorts collected from various sources, using buoys, using satellite maps of sea, river and lake surfaces of the NOAA agency.
We use data from various local authorities in each specific location of the world to more accurately reflect temperature values.
The nearest airport is located in a 13 kilometers. This is Dinard-Pleurtuit-Saint-Malo (DNR) airport. We have no information as to whether it is valid and what flights it receives or sends.
Saint-Cast-le-Guildo: weather forecast
The weather forecast is shown in local time in Saint-Cast-le-Guildo
14km/hhumidity: 91%, clouds: 100%
12km/hhumidity: 77%, clouds: 100%
11km/hhumidity: 70%, clouds: 90%
5km/hhumidity: 75%, clouds: 96%
5km/hhumidity: 81%, clouds: 89%
10km/hhumidity: 82%, clouds: 95%
11km/hhumidity: 87%, clouds: 100%
15km/hhumidity: 91%, clouds: 95%
17km/hhumidity: 86%, clouds: 97%
16km/hhumidity: 67%, clouds: 91%
16km/hhumidity: 80%, clouds: 98%
11km/hhumidity: 80%, clouds: 99%
7km/hhumidity: 84%, clouds: 100%
4km/hhumidity: 87%, clouds: 100%
10km/hhumidity: 91%, clouds: 92%
13km/hhumidity: 88%, clouds: 90%
15km/hhumidity: 96%, clouds: 100%
23km/hhumidity: 92%, clouds: 100%
18km/hhumidity: 83%, clouds: 97%
15km/hhumidity: 85%, clouds: 99%
15km/hhumidity: 95%, clouds: 32%
9km/hhumidity: 96%, clouds: 63%
11km/hhumidity: 92%, clouds: 87%
18km/hhumidity: 95%, clouds: 75%
15km/hhumidity: 90%, clouds: 89%
28km/hhumidity: 89%, clouds: 95%
27km/hhumidity: 89%, clouds: 100%
26km/hhumidity: 89%, clouds: 100%
16km/hhumidity: 88%, clouds: 95%
13km/hhumidity: 90%, clouds: 57%
11km/hhumidity: 89%, clouds: 28%
10km/hhumidity: 87%, clouds: 18%
14km/hhumidity: 71%, clouds: 2%
10km/hhumidity: 58%, clouds: 2%
5km/hhumidity: 55%, clouds: 29%
2km/hhumidity: 71%, clouds: 66%
9km/hhumidity: 79%, clouds: 98%
6km/hhumidity: 83%, clouds: 95%
6km/hhumidity: 85%, clouds: 25%
