Sisak — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Sisak, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Sisak today is 18.9°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 3 | 19.6°C | 18.0°C | |
| JUN 4 | 19.4°C | 18.0°C | |
| JUN 5 | 19.5°C | 18.0°C | |
| JUN 6 | 19.4°C | 18.0°C | |
| JUN 7 | 19.1°C | 18.0°C | |
| JUN 8 | 18.3°C | 18.0°C | |
| JUN 10 | 18.9°C | 18.0°C | |
| JUN 11 | 18.0°C | 18.9°C | |
| JUN 12 | 18.0°C | 18.8°C | |
| JUN 13 | 18.0°C | 18.8°C | |
| JUN 14 | 18.0°C | 18.7°C | |
| JUN 15 | 18.0°C | 18.7°C | |
| JUN 16 | 18.0°C | 18.6°C | |
| JUN 17 | 18.0°C | 18.6°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 | 3°C | 8°C | 11°C |
| February | 4°C | 8°C | 10°C |
| March | 7°C | 10°C | 13°C |
| April | 8°C | 12°C | 15°C |
| May | 9°C | 14°C | 20°C |
| June | 13°C | 18°C | 22°C |
| July | 15°C | 19°C | 24°C |
| August | 15°C | 19°C | 24°C |
| September | 12°C | 17°C | 21°C |
| October | 10°C | 14°C | 17°C |
| November | 6°C | 10°C | 13°C |
| December | 4°C | 8°C | 11°C |
Sisak: Weather Forecast
June 9
June 10
June 11
June 12
June 13
June 14
Location & Local Information
In the city of Sisak, the Sava River is wide and steady, carrying waters from the mountains toward the lowlands. During the summer months, water temperatures usually reach between 21–25°C, depending on the flow and recent weather. Since the river here is influenced by tributaries like the Kupa, its temperature can vary slightly, but in general it becomes warm enough for swimming in July and August.
Swimming in the Sava at Sisak is possible, especially in calmer stretches near accessible riverbanks. Locals sometimes use these areas to cool down during hot days, though the river’s current should always be respected. The experience of swimming here is more natural and authentic compared to tourist lakes, with greenery along the banks creating a peaceful backdrop for relaxation by the water.