Plešné jezero — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Plešné jezero, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Plešné jezero today is 19.2°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 4 | 19.1°C | 17.5°C | |
| AUG 5 | 19.5°C | 17.5°C | |
| AUG 6 | 19.9°C | 17.5°C | |
| AUG 7 | 20.1°C | 17.5°C | |
| AUG 8 | 19.8°C | 17.5°C | |
| AUG 9 | 19.4°C | 17.5°C | |
| AUG 10 | 19.0°C | 17.5°C | |
| AUG 11 | 19.2°C | 17.5°C | |
| AUG 12 | 17.5°C | 19.1°C | |
| AUG 13 | 17.5°C | 19.0°C | |
| AUG 14 | 17.5°C | 18.9°C | |
| AUG 15 | 17.5°C | 18.9°C | |
| AUG 16 | 17.5°C | 18.8°C | |
| AUG 17 | 17.5°C | 18.7°C | |
| AUG 18 | 17.5°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 | 0°C | 5°C | 9°C |
| February | 0°C | 5°C | 9°C |
| March | 0°C | 6°C | 11°C |
| April | 2°C | 9°C | 16°C |
| May | 7°C | 14°C | 21°C |
| June | 11°C | 17°C | 22°C |
| July | 13°C | 19°C | 24°C |
| August | 12°C | 18°C | 23°C |
| September | 9°C | 14°C | 19°C |
| October | 6°C | 11°C | 16°C |
| November | 0°C | 9°C | 16°C |
| December | 0°C | 4°C | 8°C |
Plešné jezero: Water Temperature by Location
Plešné jezero: Weather Forecast
August 12
August 13
August 14
August 15
August 16
Location & Local Information
Plešné jezero is a glacial lake set high in the Šumava Mountains, and its mountain location greatly influences the water temperature. Even in the middle of summer, the lake remains quite cold, with typical temperatures ranging from 12–16 °C. The depth and elevation prevent it from warming significantly, so bathing here is more of a brisk, refreshing dip rather than a leisurely swim. For most visitors, the cool water is part of the lake’s wild and natural charm.
Because of its chilly conditions, Plešné jezero is not a typical swimming destination like lowland ponds or reservoirs. Instead, it appeals to those who enjoy the challenge of cold-water bathing or simply want to experience the pristine mountain environment up close. The dramatic scenery surrounding the lake makes it a unique spot where swimming becomes less about comfort and more about the invigorating experience of immersing oneself in pure, cold mountain water.