Arlanza River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Arlanza River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Arlanza River today is 18.4°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 |
|---|---|---|---|
| SEP 13 | 19.2°C | 14.9°C | |
| SEP 14 | 19.0°C | 14.9°C | |
| SEP 15 | 18.3°C | 14.9°C | |
| SEP 16 | 20.3°C | 14.9°C | |
| SEP 17 | 20.2°C | 14.9°C | |
| SEP 18 | 19.4°C | 14.9°C | |
| SEP 19 | 19.5°C | 14.9°C | |
| SEP 20 | 18.5°C | 14.9°C | |
| SEP 21 | 14.9°C | 18.2°C | |
| SEP 22 | 14.9°C | 18.1°C | |
| SEP 23 | 14.9°C | 17.9°C | |
| SEP 24 | 14.9°C | 17.7°C | |
| SEP 25 | 14.9°C | 17.5°C | |
| SEP 26 | 14.9°C | 17.4°C | |
| SEP 27 | 14.9°C | 17.2°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 | 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 | 10°C | 16°C | 22°C |
| July | 13°C | 18°C | 24°C |
| August | 13°C | 19°C | 25°C |
| September | 10°C | 15°C | 20°C |
| October | 9°C | 12°C | 15°C |
| November | 5°C | 9°C | 11°C |
| December | 2°C | 6°C | 9°C |
Arlanza River: Water Temperature by Location
Arlanza River: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Source Fuente Sanza
• location Quintanar de la Sierra, Sierra de la Demanda, Burgos, Castile and León, Spain
• elevation 1,282 m (4,206 ft)
Mouth La Requejada, Pisuerga river
• location Torquemada, Cerrato, Palencia, Castile and León, Spain
• elevation 737 m (2,418 ft)
Length 160 km (99 mi)
The Río Arlanza in Castile and León shows clear seasonal variation in water temperature driven by rainfall, snowmelt and river morphology. In winter the river is cold, commonly around 2–6 °C (36–43 °F), while spring temperatures typically rise to roughly 8–14 °C (46–57 °F) as flows moderate. During the warmest weeks of summer surface temperatures in sheltered pools and slower reaches often reach 16–24 °C (61–75 °F), occasionally a little higher in very shallow, sun‑exposed spots. In autumn the river cools again to about 10–16 °C (50–61 °F). Local conditions such as depth, shading, recent rains and upstream releases can produce substantial short‑term fluctuations from these general ranges.
Swimming in the Río Arlanza is possible in many places, particularly in summer when temperatures are most comfortable, but it is not uniformly regulated as formal bathing areas along the whole course. Some stretches are used by locals for bathing when flows are low and water quality appears good, while other sections are unsuitable due to strong currents, submerged rocks, cold springs or protections for water supplies and ecosystems. Because monitoring and lifeguard services are limited, authorities or landowners may prohibit access at specific sites; therefore it is advisable to check local signage, water quality and flow conditions before entering and to avoid risky or restricted sections.