Dragonja River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Dragonja River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Dragonja River today is 20°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 |
|---|---|---|---|
| JUL 16 | 20.0°C | 19.0°C | |
| JUL 17 | 20.4°C | 19.0°C | |
| JUL 18 | 22.4°C | 19.0°C | |
| JUL 19 | 22.2°C | 19.0°C | |
| JUL 20 | 22.0°C | 19.0°C | |
| JUL 21 | 21.9°C | 19.0°C | |
| JUL 22 | 21.6°C | 19.0°C | |
| JUL 23 | 20.0°C | 19.0°C | |
| JUL 24 | 19.0°C | 20.0°C | |
| JUL 25 | 19.0°C | 19.9°C | |
| JUL 26 | 19.0°C | 19.9°C | |
| JUL 27 | 19.0°C | 19.8°C | |
| JUL 28 | 19.0°C | 19.8°C | |
| JUL 29 | 19.0°C | 19.7°C | |
| JUL 30 | 19.0°C | 19.7°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 | 4°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 | 18°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 | 7°C | 10°C | 13°C |
| December | 5°C | 9°C | 11°C |
Dragonja River: Water Temperature by Location
Dragonja River: Weather Forecast
July 24
July 25
July 26
July 27
Location & Local Information
Source:
• location Poletiči (Koper)
• elevation 315 m (1,033 ft)
Mouth:
• location Adriatic Sea, Sečovlje Saltpans
• coordinates 45°28′42″N 13°35′10″E
Length 30 km (19 mi)
The Dragonja River flows through southwestern Slovenia, forming part of the natural border with Croatia before reaching the Adriatic Sea. Because it is relatively small and shallow, the water temperature in summer tends to rise quickly, often becoming pleasantly warm on hot days. However, the river also reacts to weather changes, so after rain it can cool down noticeably. Unlike large lakes or coastal waters, its conditions vary a lot depending on the season and recent weather.
Swimming in the Dragonja is not common, as the river is narrow, rocky, and in many places quite shallow. Still, on warm summer days locals and hikers sometimes dip their feet or cool off in calm pools along its course. The lower part of the river, closer to the sea, may offer slightly deeper spots suitable for short swims, but overall it is more a place to refresh yourself briefly than for full recreational swimming.