Shiroka Polyana Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Shiroka Polyana Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Shiroka Polyana Lake today is 15.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 |
|---|---|---|---|
| SEP 13 | 17.4°C | 15.0°C | |
| SEP 14 | 17.4°C | 15.0°C | |
| SEP 15 | 16.4°C | 15.0°C | |
| SEP 16 | 16.3°C | 15.0°C | |
| SEP 17 | 16.0°C | 15.0°C | |
| SEP 18 | 15.9°C | 15.0°C | |
| SEP 19 | 15.3°C | 15.0°C | |
| SEP 20 | 15.2°C | 15.0°C | |
| SEP 21 | 15.0°C | 15.1°C | |
| SEP 22 | 15.0°C | 15.1°C | |
| SEP 23 | 15.0°C | 15.1°C | |
| SEP 24 | 15.0°C | 15.1°C | |
| SEP 25 | 15.0°C | 15.1°C | |
| SEP 26 | 15.0°C | 15.1°C | |
| SEP 27 | 15.0°C | 15.1°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 | 3°C | 6°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 5°C | 9°C |
| April | 3°C | 8°C | 12°C |
| May | 5°C | 12°C | 19°C |
| June | 10°C | 15°C | 21°C |
| July | 12°C | 18°C | 23°C |
| August | 13°C | 19°C | 24°C |
| September | 10°C | 15°C | 21°C |
| October | 7°C | 11°C | 14°C |
| November | 3°C | 8°C | 11°C |
| December | 0°C | 3°C | 6°C |
Shiroka Polyana Lake: Water Temperature by Location
Shiroka Polyana Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Shiroka Polyana Reservoir sits in the Rhodope Mountains and typically has cool, mountain-influenced water temperatures. Seasonal ranges are roughly: winter close to freezing, around 0–4 °C (32–39 °F); spring warming gradually to about 4–12 °C (39–54 °F); late spring and early summer commonly 10–18 °C (50–64 °F); and in the warmest weeks of July–August surface temperatures can reach roughly 18–22 °C (64–72 °F), sometimes a few degrees higher in sheltered bays on hot years. Because the reservoir is fed by mountain streams and shaded by surrounding slopes, it stays noticeably colder than lowland lakes even in midsummer, and deeper water remains cold year-round.
Swimming is practiced there in the warm months but with caveats: there is no extensive lifeguarded infrastructure, and areas close to the dam, intake structures or boat traffic are unsafe or officially restricted. Sudden changes in water level for hydropower, steep or rocky shores, and cold deep water increase risk, so many visitors choose shallow, sheltered spots for brief swims only when conditions are calm. If you plan to swim, check local signage and guidance, avoid restricted zones, and be prepared for cool temperatures even on warm days.