Vodní nádrž Slapy — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Vodní nádrž Slapy, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Vodní nádrž Slapy today is 19.9°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 26 | 18.7°C | 19.7°C | |
| AUG 27 | 18.8°C | 19.7°C | |
| AUG 28 | 19.2°C | 19.7°C | |
| AUG 29 | 20.2°C | 19.7°C | |
| AUG 30 | 20.3°C | 19.7°C | |
| AUG 31 | 20.2°C | 19.7°C | |
| SEP 1 | 20.2°C | 15.5°C | |
| SEP 2 | 19.9°C | 15.5°C | |
| SEP 3 | 15.5°C | 19.7°C | |
| SEP 4 | 15.5°C | 19.5°C | |
| SEP 5 | 15.5°C | 19.2°C | |
| SEP 6 | 15.5°C | 19.0°C | |
| SEP 7 | 15.5°C | 18.8°C | |
| SEP 8 | 15.5°C | 18.6°C | |
| SEP 9 | 15.5°C | 18.4°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 | 1°C | 5°C | 9°C |
| March | 3°C | 7°C | 11°C |
| April | 5°C | 10°C | 16°C |
| May | 8°C | 13°C | 21°C |
| June | 14°C | 19°C | 25°C |
| July | 17°C | 20°C | 24°C |
| August | 15°C | 20°C | 25°C |
| September | 11°C | 16°C | 20°C |
| October | 8°C | 13°C | 16°C |
| November | 2°C | 10°C | 16°C |
| December | 1°C | 5°C | 8°C |
Vodní nádrž Slapy: Water Temperature by Location
Vodní nádrž Slapy: Weather Forecast
September 2
September 3
September 4
September 5
September 6
September 7
Location & Local Information
Vodní nádrž Slapy is a large reservoir on the Vltava River, located south of Prague, and it is a popular spot for summer recreation. During the warmest months, water temperatures near the shores usually reach around 20–25 °C, making it very comfortable for swimming, wading, and other water activities. In spring and early autumn, the water tends to be cooler, often around 15–18 °C, which makes bathing refreshing but shorter in duration for most people.
Swimming at Slapy is well-established, with many designated areas along the shores, as well as marinas and calm inlets suitable for families and casual swimmers. The water is generally safe, though some parts of the reservoir are deeper and have stronger currents due to boating activity, so caution is advised when venturing farther from the shore. Beaches, grassy banks, and small piers make it easy to enter the water, and many locals and visitors enjoy spending the day cooling off in the summer heat.
Besides swimming, Slapy Reservoir is popular for a wide range of water sports, including kayaking, sailing, and paddleboarding, which adds to the lively atmosphere during summer weekends. Its combination of warm water, scenic surroundings, and accessible bathing spots makes it one of the most attractive recreational lakes in the Czech Republic for both relaxation and active water fun.