Čertovo jezero — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Čertovo jezero, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Čertovo jezero today is 14.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. 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 15 | 16.6°C | 18.5°C | |
| JUL 16 | 17.9°C | 18.5°C | |
| JUL 17 | 18.0°C | 18.5°C | |
| JUL 18 | 18.4°C | 18.5°C | |
| JUL 19 | 18.3°C | 18.5°C | |
| JUL 20 | 16.0°C | 18.5°C | |
| JUL 21 | 15.2°C | 18.5°C | |
| JUL 22 | 15.0°C | 18.5°C | |
| JUL 23 | 18.5°C | 14.9°C | |
| JUL 24 | 18.5°C | 15.1°C | |
| JUL 25 | 18.5°C | 15.3°C | |
| JUL 26 | 18.5°C | 15.5°C | |
| JUL 27 | 18.5°C | 15.7°C | |
| JUL 28 | 18.5°C | 15.8°C | |
| JUL 29 | 18.5°C | 16.0°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 | 1°C | 6°C | 11°C |
| April | 2°C | 10°C | 16°C |
| May | 8°C | 15°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 | 8°C | 16°C |
| December | 0°C | 5°C | 8°C |
Čertovo jezero: Water Temperature by Location
Čertovo jezero: Weather Forecast
July 23
July 24
July 25
July 26
July 27
Location & Local Information
Čertovo jezero, located in the Šumava National Park in the Czech Republic, is a small glacial lake set amid dense forests and mountainous terrain. Due to its high elevation and relatively small size, the water remains quite cold even during summer, generally reaching only about 11–14 °C. This makes swimming challenging for most visitors, as the lake is better suited for short, brisk dips rather than prolonged bathing.
The lake is surrounded by natural, rocky, and mossy banks with no formal swimming facilities or lifeguards. Access to the water is limited and often requires careful footing, so visitors should be cautious when entering the lake. Shallow, sun-exposed areas may feel slightly more comfortable, but the overall experience of swimming is invigorating and refreshing rather than leisurely.
Čertovo jezero is more popular for hiking, nature observation, and photography than for swimming. Its tranquil setting, clear waters, and scenic surroundings make it an ideal spot for enjoying the natural beauty of the Šumava region. Even if swimming is limited by the cold temperatures, a brief dip can be a refreshing reward after a hike, while the lake’s serene environment offers a peaceful retreat in the mountains.