Douro River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Douro River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Douro River today is 18.3°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 |
|---|---|---|---|
| JUN 1 | 20.4°C | 17.0°C | |
| JUN 2 | 18.8°C | 17.0°C | |
| JUN 3 | 18.1°C | 17.0°C | |
| JUN 4 | 18.1°C | 17.0°C | |
| JUN 5 | 18.0°C | 17.0°C | |
| JUN 6 | 17.8°C | 17.0°C | |
| JUN 7 | 18.4°C | 17.0°C | |
| JUN 8 | 18.3°C | 17.0°C | |
| JUN 9 | 17.0°C | 18.2°C | |
| JUN 10 | 17.0°C | 18.2°C | |
| JUN 11 | 17.0°C | 18.1°C | |
| JUN 12 | 17.0°C | 18.0°C | |
| JUN 13 | 17.0°C | 18.0°C | |
| JUN 14 | 17.0°C | 17.9°C | |
| JUN 15 | 17.0°C | 17.8°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 | 5°C | 9°C | 11°C |
| April | 8°C | 12°C | 16°C |
| May | 10°C | 16°C | 22°C |
| June | 12°C | 17°C | 21°C |
| July | 14°C | 18°C | 23°C |
| August | 15°C | 19°C | 24°C |
| September | 12°C | 17°C | 21°C |
| October | 9°C | 13°C | 16°C |
| November | 6°C | 10°C | 13°C |
| December | 2°C | 6°C | 9°C |
Douro River: Water Temperature by Location
Douro River: Weather Forecast
June 9
June 10
June 11
June 12
June 13
June 14
Location & Local Information
Source Picos de Urbión
• location Sistema Ibérico, Duruelo de la Sierra, Soria, Castile and León, Spain
• elevation 2,157 m (7,077 ft)
Mouth Foz do Douro
• location Atlantic Ocean, Porto, Greater Porto, Norte, Portugal
• elevation 0 m (0 ft)
Length 897 km (557 mi)
The Duero River, locally known as the Río Duero in Castile and León, shows marked seasonal and local variation in water temperature because of its continental climate, variable flow and impoundments. In winter surface temperatures typically range from about 4–8 °C (39–46 °F) in colder reaches; spring sees a rise toward roughly 8–14 °C (46–57 °F) as snowmelt and rain increase flows; summer surface temperatures in slower, shallow sections can reach about 16–24 °C (61–75 °F), though faster, deeper channels often remain cooler; autumn generally cools to roughly 10–16 °C (50–61 °F) as runoff reduces. Temperatures fluctuate with depth, shade, weather and proximity to reservoirs or thermal discharges, so local readings can differ from these typical ranges.
Swimming in the Río Duero is possible in many calmer stretches and in formally designated river beaches (playas fluviales) where local authorities have assessed safety and water quality, but it is not universally permitted. Near dams, spillways, weirs, intake structures and some fast-flowing sections swimming is unsafe or prohibited because of strong currents, submerged hazards and infrastructure. Water quality may also vary with agricultural runoff or low flow, so swimmers should follow local signage, seasonal advisories and exercise caution regarding cold shock and currents even when temperatures seem moderate.