Tagus River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Tagus River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Tagus River today is 28.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating. 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 | 28.1°C | 23.1°C | |
| AUG 5 | 28.1°C | 23.1°C | |
| AUG 6 | 27.7°C | 23.1°C | |
| AUG 7 | 27.7°C | 23.1°C | |
| AUG 8 | 27.8°C | 23.1°C | |
| AUG 9 | 27.8°C | 23.1°C | |
| AUG 10 | 28.1°C | 23.1°C | |
| AUG 11 | 28.1°C | 23.1°C | |
| AUG 12 | 23.1°C | 27.9°C | |
| AUG 13 | 23.1°C | 27.6°C | |
| AUG 14 | 23.1°C | 27.4°C | |
| AUG 15 | 23.1°C | 27.1°C | |
| AUG 16 | 23.1°C | 26.9°C | |
| AUG 17 | 23.1°C | 26.6°C | |
| AUG 18 | 23.1°C | 26.4°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 | 5°C | 9°C | 11°C |
| February | 5°C | 9°C | 11°C |
| March | 8°C | 11°C | 14°C |
| April | 9°C | 14°C | 19°C |
| May | 9°C | 16°C | 24°C |
| June | 15°C | 20°C | 26°C |
| July | 18°C | 23°C | 28°C |
| August | 18°C | 23°C | 29°C |
| September | 17°C | 21°C | 26°C |
| October | 13°C | 17°C | 19°C |
| November | 8°C | 13°C | 17°C |
| December | 6°C | 10°C | 13°C |
Tagus River: Water Temperature by Location
Tagus River: Weather Forecast
August 12
August 13
August 14
August 15
Location & Local Information
Source Fuente de García, Montes Universales
• location Frías de Albarracín, Spain
• coordinates 40°19′16″N 1°41′49″W
• elevation 1,593 m (5,226 ft)
Mouth Estuary of the Tagus, Atlantic Ocean
• location Lisbon, Portugal
• coordinates 38°41′28″N 9°10′16″W
• elevation 0 m (0 ft)
Length 1,007 km (626 mi)
The Río Tajo (Tagus) in its Aragonese upper course runs through mountainous terrain, so water temperatures tend to be relatively low compared with lowland stretches. Typical seasonal ranges in these reaches are roughly: winter about 2–8 °C (35.6–46.4 °F) due to altitude and snowmelt influence; spring roughly 6–14 °C (42.8–57.2 °F) as flows remain cool but start to warm; summer generally 15–22 °C (59–71.6 °F) in slower, sun-exposed pools and reservoirs, occasionally reaching the mid-20s °C (mid-70s °F) in very shallow, sheltered spots; autumn commonly 8–16 °C (46.4–60.8 °F) as temperatures decline. Local variations are strong: shaded gorges and fast-flowing sections stay colder year-round, while impoundments and meadows warm sooner.
Swimming is possible in some calmer reaches and in reservoirs where bathing is not explicitly prohibited, but it is not universally permitted or advisable. Restrictions arise for safety—cold temperatures, strong currents, submerged rocks and sudden releases from upstream dams—and for environmental protection in sensitive natural areas. Water quality in the upper Tagus is often good, yet municipal or conservation rules and on-site signage determine permitted activities. Visitors should check local regulations, avoid high-flow conditions, and be aware that even in summer the water can be uncomfortably cold for prolonged immersion.