Mantes-la-Jolie — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Mantes-la-Jolie, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Mantes-la-Jolie today is 20.9°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| JUL 26 | 20.8°C | 17.6°C | |
| JUL 27 | 21.0°C | 17.6°C | |
| JUL 28 | 20.9°C | 17.6°C | |
| JUL 29 | 20.9°C | 17.6°C | |
| JUL 30 | 20.9°C | 17.6°C | |
| JUL 31 | 20.9°C | 17.6°C | |
| AUG 1 | 20.9°C | 18.0°C | |
| AUG 2 | 20.9°C | 18.0°C | |
| AUG 3 | 18.0°C | 20.8°C | |
| AUG 4 | 18.0°C | 20.6°C | |
| AUG 5 | 18.0°C | 20.5°C | |
| AUG 6 | 18.0°C | 20.3°C | |
| AUG 7 | 18.0°C | 20.2°C | |
| AUG 8 | 18.0°C | 20.0°C | |
| AUG 9 | 18.0°C | 19.9°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 | 3°C | 7°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 | 13°C | 18°C |
| June | 12°C | 17°C | 21°C |
| July | 13°C | 18°C | 23°C |
| August | 14°C | 18°C | 23°C |
| September | 12°C | 17°C | 21°C |
| October | 9°C | 12°C | 15°C |
| November | 5°C | 8°C | 12°C |
| December | 3°C | 7°C | 9°C |
Mantes-la-Jolie: Weather Forecast
August 3
August 4
August 5
August 6
August 7
August 8
Location & Local Information
Mantes-la-Jolie, a charming city located on the banks of the Seine River in the Yvelines department of France, experiences moderate water temperatures in the river throughout the year. In winter, the Seine's temperature near Mantes-la-Jolie tends to drop to between 5°C and 8°C, while in summer, it usually ranges from 18°C to 22°C, with peaks during heatwaves. Although the summer temperatures can be inviting, swimming in the Seine around Mantes-la-Jolie is generally not recommended due to water quality concerns and the presence of boat traffic in this busy section of the river.
In lieu of river swimming, Mantes-la-Jolie offers alternative recreational options, such as local swimming pools and leisure areas. Residents and visitors can enjoy water activities at nearby facilities that provide clean, controlled environments for swimming and other aquatic sports. The city’s parks and riverside paths also allow for pleasant walks along the Seine, offering scenic views of the river and the beautiful architecture of Mantes-la-Jolie, including the impressive Collégiale Notre-Dame.
For those who want to be close to the water without entering the Seine, activities such as canoeing and fishing are popular along the riverbanks in Mantes-la-Jolie. These allow for interaction with the Seine’s natural beauty in a safe and enjoyable way, while the city continues to improve water management efforts in line with broader initiatives to rehabilitate the river’s ecosystem over time.