Lac de Guerlédan — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lac de Guerlédan, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lac de Guerlédan today is 18.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 |
|---|---|---|---|
| AUG 19 | 19.4°C | 21.0°C | |
| AUG 20 | 19.3°C | 21.0°C | |
| AUG 21 | 19.1°C | 21.0°C | |
| AUG 22 | 19.1°C | 21.0°C | |
| AUG 23 | 19.1°C | 21.0°C | |
| AUG 24 | 18.9°C | 21.0°C | |
| AUG 25 | 18.8°C | 21.0°C | |
| AUG 26 | 18.4°C | 21.0°C | |
| AUG 27 | 21.0°C | 18.4°C | |
| AUG 28 | 21.0°C | 18.5°C | |
| AUG 29 | 21.0°C | 18.5°C | |
| AUG 30 | 21.0°C | 18.5°C | |
| AUG 31 | 21.0°C | 18.6°C | |
| SEP 1 | 19.0°C | 18.6°C | |
| SEP 2 | 19.0°C | 18.6°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 | 10°C |
| February | 3°C | 7°C | 10°C |
| March | 6°C | 10°C | 13°C |
| April | 9°C | 13°C | 17°C |
| May | 11°C | 17°C | 22°C |
| June | 14°C | 21°C | 26°C |
| July | 17°C | 24°C | 29°C |
| August | 16°C | 21°C | 26°C |
| September | 13°C | 19°C | 24°C |
| October | 9°C | 13°C | 17°C |
| November | 6°C | 10°C | 13°C |
| December | 4°C | 8°C | 11°C |
Lac de Guerlédan: Water Temperature by Location
Lac de Guerlédan: Weather Forecast
August 27
August 28
August 29
August 30
August 31
Location & Local Information
Lac de Guerlédan, located in the Brittany region of France, is the largest lake in the region and a popular destination for outdoor enthusiasts. It was created by the Guerlédan Dam on the Blavet River and offers a variety of recreational activities, including boating, fishing, and hiking around its scenic shores. The lake’s water temperature can vary significantly throughout the year, with the warmest conditions occurring during the summer months. In July and August, the water temperature typically reaches around 20°C to 22°C (68°F to 72°F), making it suitable for swimming. Many visitors enjoy taking a dip during these months, though the lack of designated swimming areas means swimmers must take extra precautions. There are no lifeguards, and the water can have varying depths and currents, so swimming is recommended only in calm, less trafficked sections.
During the cooler months, the water temperature in Lac de Guerlédan drops considerably, often falling to around 10°C to 12°C (50°F to 54°F) in spring and fall, making swimming less comfortable and more challenging. While the lake is a beautiful spot for walking and cycling along its shores, the cooler water can deter many swimmers during these periods. It is advisable to check the water quality before swimming, as the lake is used for various activities, including boat traffic and fishing. In addition to swimming, Lac de Guerlédan is also known for its stunning natural beauty, offering visitors the chance to enjoy a peaceful, picturesque environment while participating in various outdoor pursuits.