Sumy — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Sumy, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Sumy today is 19.9°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 5 | 16.0°C | 17.0°C | |
| JUN 6 | 16.1°C | 17.0°C | |
| JUN 7 | 16.4°C | 17.0°C | |
| JUN 8 | 17.5°C | 17.0°C | |
| JUN 10 | 18.5°C | 17.0°C | |
| JUN 11 | 19.1°C | 17.0°C | |
| JUN 12 | 19.5°C | 17.0°C | |
| JUN 13 | 17.0°C | 19.8°C | |
| JUN 14 | 17.0°C | 19.6°C | |
| JUN 15 | 17.0°C | 19.5°C | |
| JUN 16 | 17.0°C | 19.3°C | |
| JUN 17 | 17.0°C | 19.2°C | |
| JUN 18 | 17.0°C | 19.0°C | |
| JUN 19 | 17.0°C | 18.9°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 | 0°C | 5°C | 10°C |
| April | 5°C | 9°C | 12°C |
| May | 5°C | 12°C | 20°C |
| June | 12°C | 17°C | 21°C |
| July | 13°C | 18°C | 22°C |
| August | 14°C | 18°C | 23°C |
| September | 10°C | 15°C | 19°C |
| October | 6°C | 9°C | 12°C |
| November | 4°C | 8°C | 10°C |
| December | 0°C | 5°C | 9°C |
Sumy: Weather Forecast
June 13
June 14
June 15
June 16
June 17
June 18
Location & Local Information
In Sumy, the Psel River experiences a wide annual range of water temperatures due to the region’s continental climate. In winter, the river often freezes, and water temperatures remain close to 0°C. With the arrival of spring, the ice melts, and the temperature gradually rises to around 10–12°C in April. By early summer, it warms up considerably, reaching 20–23°C in June, and during the hottest periods of July and August, the water can occasionally climb to 25°C, especially in shallower sections. In September, it starts cooling again, dropping below 18°C, and by late autumn it becomes too cold for comfortable swimming.
Swimming in the Psel within Sumy is most enjoyable from mid-June to late August, when the water feels mild and refreshing. The riverbanks in some parts of the city are sandy or gently sloping, making it convenient for bathing. However, swimmers should be mindful of the current, vegetation, and occasional uneven bottom. Outside of the summer months, swimming is mostly limited to enthusiasts of cold water bathing.