Zagreb — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Zagreb, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Zagreb today is 18.8°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 |
|---|---|---|---|
| SEP 15 | 18.6°C | 16.6°C | |
| SEP 16 | 18.3°C | 16.6°C | |
| SEP 17 | 18.1°C | 16.6°C | |
| SEP 18 | 19.1°C | 16.6°C | |
| SEP 19 | 18.1°C | 16.6°C | |
| SEP 20 | 18.4°C | 16.6°C | |
| SEP 21 | 18.4°C | 16.6°C | |
| SEP 22 | 18.8°C | 16.6°C | |
| SEP 23 | 16.6°C | 18.7°C | |
| SEP 24 | 16.6°C | 18.6°C | |
| SEP 25 | 16.6°C | 18.5°C | |
| SEP 26 | 16.6°C | 18.4°C | |
| SEP 27 | 16.6°C | 18.3°C | |
| SEP 28 | 16.6°C | 18.1°C | |
| SEP 29 | 16.6°C | 18.0°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 | 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 | 19°C |
| June | 13°C | 18°C | 24°C |
| July | 15°C | 20°C | 25°C |
| August | 15°C | 20°C | 26°C |
| September | 12°C | 17°C | 22°C |
| October | 10°C | 14°C | 17°C |
| November | 5°C | 9°C | 13°C |
| December | 3°C | 7°C | 11°C |
Zagreb: Weather Forecast
September 23
September 24
September 25
September 26
Location & Local Information
In Zagreb, the Sava River flows wide and fast, cutting through the city and serving as one of its main natural features. The water temperature here is strongly influenced by mountain streams and upstream reservoirs, which means it usually stays cooler than many lowland rivers. Even in the height of summer, the Sava in Zagreb often feels fresh, making it less predictable for comfortable long swims compared to lakes or smaller rivers.
Swimming in the Sava within Zagreb is not a common activity, as the current is strong and the river is primarily managed for flood control and energy. There are no official bathing areas in the city itself, and most residents prefer to swim in nearby lakes, such as Jarun, which offer safer and more pleasant conditions. Still, the riverbanks are popular for cycling, walking, and enjoying the view, while the Sava itself remains more of a backdrop than a swimming destination.