Belmeken Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Belmeken Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Belmeken Reservoir 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 |
|---|---|---|---|
| SEP 13 | 16.2°C | 12.0°C | |
| SEP 14 | 15.3°C | 12.0°C | |
| SEP 15 | 15.3°C | 12.0°C | |
| SEP 16 | 15.4°C | 12.0°C | |
| SEP 17 | 15.2°C | 12.0°C | |
| SEP 18 | 14.8°C | 12.0°C | |
| SEP 19 | 14.2°C | 12.0°C | |
| SEP 20 | 14.6°C | 12.0°C | |
| SEP 21 | 12.0°C | 14.6°C | |
| SEP 22 | 12.0°C | 14.4°C | |
| SEP 23 | 12.0°C | 14.3°C | |
| SEP 24 | 12.0°C | 14.2°C | |
| SEP 25 | 12.0°C | 14.0°C | |
| SEP 26 | 12.0°C | 13.9°C | |
| SEP 27 | 12.0°C | 13.8°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 | 2°C | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 4°C | 7°C |
| April | 0°C | 5°C | 9°C |
| May | 3°C | 9°C | 14°C |
| June | 7°C | 12°C | 18°C |
| July | 10°C | 15°C | 21°C |
| August | 10°C | 15°C | 21°C |
| September | 7°C | 12°C | 18°C |
| October | 5°C | 9°C | 12°C |
| November | 1°C | 5°C | 8°C |
| December | 0°C | 2°C | 5°C |
Belmeken Reservoir: Water Temperature by Location
Belmeken Reservoir: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Belmeken Reservoir (Язовир Белмекен) is a high‑mountain storage lake in the Rila range of Bulgaria, and its water temperatures reflect that elevation and alpine climate. Because the lake is fed by cold mountain runoff and sits at roughly 1,900–2,000 meters above sea level, surface temperatures remain low year‑round. Typical seasonal ranges are roughly winter (frozen or close to 0 °C / 32 °F and below), spring about 1–6 °C (34–43 °F) as ice melts, summer surface temperatures roughly 6–15 °C (43–59 °F) on the warmest days, and autumn cooling back to about 2–8 °C (36–46 °F). Strong diurnal and weather‑dependent variation is common, and deeper water stays colder than the surface.
Swimming at Belmeken is uncommon and generally not recommended; the reservoir is part of a hydroelectric and pumped‑storage complex, so access and activity are often restricted for operational and safety reasons. Even where informal bathing occurs during warm spells, the low temperatures present significant hypothermia risk, and there are no lifeguards, sudden water‑level changes, underwater infrastructure, and limited emergency access. For these reasons authorities and local managers typically discourage or prohibit recreational swimming, and anyone considering entering the water should first check current rules and exercise extreme caution.