Jalón River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Jalón River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Jalón River today is 26.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 15 | 26.4°C | 20.7°C | |
| JUL 16 | 26.4°C | 20.7°C | |
| JUL 17 | 26.3°C | 20.7°C | |
| JUL 18 | 26.3°C | 20.7°C | |
| JUL 19 | 26.3°C | 20.7°C | |
| JUL 20 | 26.3°C | 20.7°C | |
| JUL 21 | 26.2°C | 20.7°C | |
| JUL 22 | 26.1°C | 20.7°C | |
| JUL 23 | 20.7°C | 25.8°C | |
| JUL 24 | 20.7°C | 25.6°C | |
| JUL 25 | 20.7°C | 25.3°C | |
| JUL 26 | 20.7°C | 25.0°C | |
| JUL 27 | 20.7°C | 24.8°C | |
| JUL 28 | 20.7°C | 24.5°C | |
| JUL 29 | 20.7°C | 24.2°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 | 7°C | 9°C |
| February | 3°C | 7°C | 9°C |
| March | 6°C | 9°C | 12°C |
| April | 9°C | 12°C | 16°C |
| May | 11°C | 16°C | 21°C |
| June | 13°C | 18°C | 24°C |
| July | 15°C | 21°C | 27°C |
| August | 16°C | 20°C | 25°C |
| September | 13°C | 18°C | 22°C |
| October | 10°C | 14°C | 17°C |
| November | 7°C | 11°C | 14°C |
| December | 3°C | 7°C | 9°C |
Jalón River: Water Temperature by Location
Jalón River: Weather Forecast
July 22
July 23
July 24
July 25
July 26
July 27
Location & Local Information
Source Esteras de Medinaceli
• location: Medinaceli, Iberian System, Castile and León
• elevation 1,192 m (3,911 ft)
Mouth Ebro
• location Torres de Berrellén, Zaragoza, Aragón
• elevation 209 m (686 ft)
Length 224 km (139 mi)
The Río Jalón, a major tributary of the Ebro flowing through Aragon, shows pronounced seasonal and local variation in water temperature. In winter months the river typically cools to around 6–10 °C (43–50 °F), while spring temperatures usually rise to about 10–16 °C (50–61 °F) as snowmelt and rainfall increase flow. During summer, shallower and slower stretches can warm to roughly 18–24 °C (64–75 °F), and in late heat waves isolated pools or reservoir arms may reach slightly higher values. Autumn brings a gradual decline, with temperatures commonly in the 12–18 °C (54–64 °F) range. Upstream, shaded and faster-moving reaches remain colder year-round, whereas impounded or slow sections warm more quickly.
Swimming in the Río Jalón is possible in many informal spots, but it is not uniformly regulated or recommended everywhere. Local authorities sometimes designate safe bathing areas, yet access can be limited by private land, variable water quality, strong currents near narrow gorges or dam structures, and episodic pollution after heavy rains. Algal growth or low oxygen conditions may develop in stagnant arms during hot summers. For safety and health, swimmers should follow signage, consult municipal guidance, and avoid risky locations such as near weirs, intakes, or fast-flowing channels.