Lake Herăstrău — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Herăstrău, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Herăstrău today is 21.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| JUN 3 | 20.8°C | 20.0°C | |
| JUN 4 | 20.8°C | 20.0°C | |
| JUN 5 | 20.8°C | 20.0°C | |
| JUN 6 | 21.5°C | 20.0°C | |
| JUN 7 | 21.2°C | 20.0°C | |
| JUN 8 | 21.1°C | 20.0°C | |
| JUN 10 | 22.5°C | 20.0°C | |
| JUN 11 | 20.0°C | 21.6°C | |
| JUN 12 | 20.0°C | 21.5°C | |
| JUN 13 | 20.0°C | 21.4°C | |
| JUN 14 | 20.0°C | 21.4°C | |
| JUN 15 | 20.0°C | 21.3°C | |
| JUN 16 | 20.0°C | 21.2°C | |
| JUN 17 | 20.0°C | 21.1°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 | 2°C | 7°C | 12°C |
| February | 2°C | 8°C | 12°C |
| March | 4°C | 10°C | 14°C |
| April | 10°C | 14°C | 18°C |
| May | 12°C | 18°C | 23°C |
| June | 14°C | 20°C | 25°C |
| July | 18°C | 23°C | 28°C |
| August | 18°C | 23°C | 28°C |
| September | 14°C | 20°C | 25°C |
| October | 11°C | 15°C | 19°C |
| November | 8°C | 12°C | 15°C |
| December | 3°C | 8°C | 12°C |
Lake Herăstrău: Water Temperature by Location
Lake Herăstrău: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Lacul Herăstrău (in Romanian: Lacul Herăstrău) is the largest lake in Bucharest’s Herăstrău Park and shows marked seasonal variation in surface water temperature. In winter the lake often approaches freezing, commonly around 0–4 °C (32–39 °F). During spring temperatures typically rise to roughly 6–16 °C (43–61 °F) as air warms and sunlight increases. In summer, surface waters can reach their highest values, frequently in the 18–26 °C range (64–79 °F) on warm days, while autumn sees a progressive cooling with temperatures generally between 8–15 °C (46–59 °F). Local conditions such as weather patterns, wind, shading and inflows can shift these ranges from year to year and between shallow and deeper areas.
Officially, swimming in Lacul Herăstrău is not permitted for several practical reasons. Water quality in an urban lake is variable and is not consistently treated to bathing standards, there are safety concerns due to boat traffic and lack of permanent lifeguard cover, and submerged hazards and variable depths increase risk. Occasional informal or occasional recreational dips may occur, but these are at the swimmer’s own risk and can be subject to local enforcement. For supervised, safe swimming people are usually directed to designated public pools or managed bathing sites where water quality and safety are controlled.