Oster River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Oster River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Oster River today is 18.5°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 |
|---|---|---|---|
| JUN 3 | 15.2°C | 19.0°C | |
| JUN 4 | 15.3°C | 19.0°C | |
| JUN 5 | 16.0°C | 19.0°C | |
| JUN 6 | 16.1°C | 19.0°C | |
| JUN 7 | 16.3°C | 19.0°C | |
| JUN 8 | 17.2°C | 19.0°C | |
| JUN 10 | 18.5°C | 19.0°C | |
| JUN 11 | 19.0°C | 18.5°C | |
| JUN 12 | 19.0°C | 18.6°C | |
| JUN 13 | 19.0°C | 18.6°C | |
| JUN 14 | 19.0°C | 18.6°C | |
| JUN 15 | 19.0°C | 18.6°C | |
| JUN 16 | 19.0°C | 18.7°C | |
| JUN 17 | 19.0°C | 18.7°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 | 5°C | 9°C |
| February | 0°C | 5°C | 9°C |
| March | 1°C | 6°C | 11°C |
| April | 4°C | 9°C | 14°C |
| May | 6°C | 12°C | 19°C |
| June | 15°C | 19°C | 24°C |
| July | 16°C | 20°C | 25°C |
| August | 15°C | 19°C | 24°C |
| September | 13°C | 18°C | 22°C |
| October | 9°C | 13°C | 16°C |
| November | 3°C | 7°C | 11°C |
| December | 1°C | 5°C | 9°C |
Oster River: Water Temperature by Location
Oster River: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Source:
• location Chernihiv Oblast
Mouth Desna
• coordinates 50.936°N 30.8478°E
Length 199 km (124 mi)
The Oster River, being a tributary of the Desna, is generally shallow and slow in many stretches, with widths of 10–30 meters and depths often between 0.2 m and 1.5 m in its lower course. In the warmest parts of summer, especially in sunny, slow-flowing backwaters, surface water can heat up to around 20–24 °C, making swimming fairly pleasant in suitable spots. But even then, deeper channels or shaded zones remain cooler, and the current or underwater vegetation may limit safe bathing.
Outside of mid-summer, water in the Oster cools rather quickly. In late spring and early autumn, temperatures may hover in the 12–16 °C range, which is chilly and more suitable for brief dips rather than extended swims. In late autumn and winter, the river cools further, and by December parts of it may freeze or become unsafe due to low temperature and ice cover.
Another consideration is water quality and river condition. The Oster is subject to fluctuations in flow, occasional shallowing, and possible pollution or algal growth during warm, low-flow periods. Thus, while swimming is possible in some stretches under good summer conditions, one must carefully assess the spot (depth, clarity, access) and avoid parts where flow is strong or water is murky.