Vilaine River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Vilaine River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Vilaine River today is 16.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| SEP 14 | 17.4°C | 16.0°C | |
| SEP 15 | 18.2°C | 16.0°C | |
| SEP 16 | 18.0°C | 16.0°C | |
| SEP 17 | 17.1°C | 16.0°C | |
| SEP 18 | 17.2°C | 16.0°C | |
| SEP 19 | 16.8°C | 16.0°C | |
| SEP 20 | 16.6°C | 16.0°C | |
| SEP 21 | 16.8°C | 16.0°C | |
| SEP 22 | 16.0°C | 16.7°C | |
| SEP 23 | 16.0°C | 16.6°C | |
| SEP 24 | 16.0°C | 16.6°C | |
| SEP 25 | 16.0°C | 16.6°C | |
| SEP 26 | 16.0°C | 16.5°C | |
| SEP 27 | 16.0°C | 16.5°C | |
| SEP 28 | 16.0°C | 16.5°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 2°C | 6°C | 9°C |
| February | 2°C | 6°C | 9°C |
| March | 5°C | 9°C | 11°C |
| April | 8°C | 11°C | 14°C |
| May | 9°C | 14°C | 18°C |
| June | 13°C | 18°C | 22°C |
| July | 16°C | 20°C | 25°C |
| August | 13°C | 18°C | 23°C |
| September | 11°C | 16°C | 20°C |
| October | 8°C | 11°C | 14°C |
| November | 5°C | 9°C | 12°C |
| December | 3°C | 7°C | 9°C |
Vilaine River: Water Temperature by Location
Vilaine River: Weather Forecast
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Source:
• location Juvigné, Mayenne
• coordinates 48°13′46″N 01°03′11″W
• elevation 175 m (574 ft)
Mouth:
• location Atlantic Ocean
• coordinates 47°30′20″N 2°29′57″W
Length 218.1 km (135.5 mi)
Basin size 10,882 km2 (4,202 sq mi)
Discharge:
• average: 80 m3/s (2,800 cu ft/s)
The Vilaine River flows through Brittany in northwestern France, passing through cities such as Rennes and Redon before reaching the Atlantic Ocean near La Roche-Bernard. During summer, water temperatures in the Vilaine generally range between 16°C and 22°C (61°F and 72°F), depending on the section and the weather conditions. This mild range makes the river suitable for recreational activities, though it is not as commonly used for swimming as other rivers due to occasional currents and boat traffic, especially in the downstream sections.
Swimming in the Vilaine is possible in certain areas, especially upstream and away from urban centers. Near Rennes, for instance, there are designated places for water sports and bathing. In other parts, like Redon and La Roche-Bernard, the riverbanks are popular for picnics, fishing, and kayaking rather than swimming. Although swimming is allowed in specific spots, the water quality is closely monitored to ensure safe conditions for bathers during the warmer months.