Ljubljanica River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Ljubljanica River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Ljubljanica River today is 19.7°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 |
|---|---|---|---|
| AUG 4 | 21.8°C | 19.0°C | |
| AUG 5 | 21.7°C | 19.0°C | |
| AUG 6 | 21.7°C | 19.0°C | |
| AUG 7 | 21.9°C | 19.0°C | |
| AUG 8 | 20.4°C | 19.0°C | |
| AUG 9 | 20.3°C | 19.0°C | |
| AUG 10 | 19.7°C | 19.0°C | |
| AUG 11 | 19.7°C | 19.0°C | |
| AUG 12 | 19.0°C | 19.7°C | |
| AUG 13 | 19.0°C | 19.6°C | |
| AUG 14 | 19.0°C | 19.6°C | |
| AUG 15 | 19.0°C | 19.6°C | |
| AUG 16 | 19.0°C | 19.5°C | |
| AUG 17 | 19.0°C | 19.5°C | |
| AUG 18 | 19.0°C | 19.5°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 | 6°C | 9°C |
| February | 2°C | 6°C | 9°C |
| March | 4°C | 8°C | 10°C |
| April | 6°C | 10°C | 14°C |
| May | 8°C | 13°C | 18°C |
| June | 11°C | 17°C | 23°C |
| July | 15°C | 19°C | 24°C |
| August | 15°C | 19°C | 24°C |
| September | 12°C | 17°C | 21°C |
| October | 9°C | 12°C | 15°C |
| November | 5°C | 9°C | 11°C |
| December | 2°C | 6°C | 9°C |
Ljubljanica River: Water Temperature by Location
Ljubljanica River: Weather Forecast
August 12
August 13
August 14
August 15
Location & Local Information
Source:
• location Retovje
• elevation 300 m (980 ft)
Mouth:
• location Podgrad
• elevation 260 m (850 ft)
Length 41 km (25 mi)
The Ljubljanica River flows through the heart of Slovenia, including the capital city Ljubljana, and is known for its calm current and urban charm. Because it is a lowland river, the water warms up more in summer compared to mountain rivers. During the warmest months, from June to August, surface temperatures typically reach 20–24°C in slower sections, making swimming comfortable in select spots. In spring and autumn, the water is cooler, around 12–16°C, while in winter it drops to 4–6°C.
Swimming in the Ljubljanica is limited and mostly done in quieter, less urbanized stretches. In the city, bathing is generally discouraged due to safety concerns and water quality, but upstream or in designated areas, a refreshing dip is possible. The river also attracts people for canoeing, kayaking, and floating activities during summer.
Outside the peak summer months, swimming is uncommon due to cooler water and occasional stronger currents. The river remains popular for walking along its banks, cycling, and enjoying cafés and parks nearby. Even a brief summer dip in calmer areas can provide a pleasant escape from the heat.