Urumea River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Urumea River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Urumea River today is 24.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 | 24.5°C | 19.9°C | |
| AUG 5 | 24.5°C | 19.9°C | |
| AUG 6 | 23.9°C | 19.9°C | |
| AUG 7 | 23.9°C | 19.9°C | |
| AUG 8 | 24.0°C | 19.9°C | |
| AUG 9 | 24.0°C | 19.9°C | |
| AUG 10 | 24.5°C | 19.9°C | |
| AUG 11 | 24.5°C | 19.9°C | |
| AUG 12 | 19.9°C | 24.3°C | |
| AUG 13 | 19.9°C | 24.0°C | |
| AUG 14 | 19.9°C | 23.8°C | |
| AUG 15 | 19.9°C | 23.6°C | |
| AUG 16 | 19.9°C | 23.4°C | |
| AUG 17 | 19.9°C | 23.1°C | |
| AUG 18 | 19.9°C | 22.9°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 | 7°C | 11°C |
| February | 4°C | 8°C | 12°C |
| March | 7°C | 10°C | 13°C |
| April | 9°C | 13°C | 16°C |
| May | 9°C | 15°C | 21°C |
| June | 13°C | 18°C | 24°C |
| July | 14°C | 20°C | 26°C |
| August | 15°C | 20°C | 25°C |
| September | 13°C | 18°C | 22°C |
| October | 10°C | 14°C | 17°C |
| November | 6°C | 12°C | 17°C |
| December | 4°C | 8°C | 12°C |
Urumea River: Water Temperature by Location
Urumea River: Weather Forecast
August 12
August 13
August 14
August 15
Location & Local Information
Source:
• location Basque Mountains
• elevation 1,136 m (3,727 ft)
Mouth:
• location Cantabrian Sea (Bay of Biscay)
Length 59.4 km (36.9 mi)
The Río Urumea flows from the Basque hinterland to the Bay of Biscay at Donostia-San Sebastián and exhibits temperatures typical of a small Atlantic river. Seasonal water temperatures generally range from about 6–10 °C (43–50 °F) in winter, 8–14 °C (46–57 °F) in spring, 16–22 °C (61–72 °F) in summer, and 10–16 °C (50–61 °F) in autumn. These values vary with rainfall, river discharge and tidal influence near the estuary, so local conditions can change quickly; shallow, sun-exposed pools warm more than deeper, shaded stretches.
Swimming in the Río Urumea is possible in principle but is not widespread, especially through the urban core of San Sebastián. Municipal authorities do not typically promote bathing in the central channel because of variable water quality after rains, fluctuating currents, and the absence of lifeguarded facilities; for safety and hygiene many people prefer the nearby monitored sea beaches. Upstream and in calmer rural reaches, informal swimming and wild bathing occur when conditions are favourable, but it is advisable to check recent water-quality reports and local regulations before entering the river.