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 12.1°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 |
|---|---|---|---|
| OCT 3 | 13.9°C | 11.0°C | |
| OCT 4 | 13.7°C | 11.0°C | |
| OCT 5 | 13.6°C | 11.0°C | |
| OCT 6 | 13.0°C | 11.0°C | |
| OCT 7 | 13.2°C | 11.0°C | |
| OCT 8 | 13.0°C | 11.0°C | |
| OCT 9 | 12.4°C | 11.0°C | |
| OCT 10 | 12.2°C | 11.0°C | |
| OCT 11 | 11.0°C | 12.0°C | |
| OCT 12 | 11.0°C | 12.0°C | |
| OCT 13 | 11.0°C | 11.9°C | |
| OCT 14 | 11.0°C | 11.9°C | |
| OCT 15 | 11.0°C | 11.8°C | |
| OCT 16 | 11.0°C | 11.8°C | |
| OCT 17 | 11.0°C | 11.7°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
October 11
October 12
October 13
October 14
October 15
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.