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 22.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 23 | 21.9°C | 18.3°C | |
| JUN 24 | 22.1°C | 18.3°C | |
| JUN 25 | 22.5°C | 18.3°C | |
| JUN 26 | 22.5°C | 18.3°C | |
| JUN 27 | 23.1°C | 18.3°C | |
| JUN 28 | 23.1°C | 18.3°C | |
| JUN 29 | 22.9°C | 18.3°C | |
| JUN 30 | 22.9°C | 18.3°C | |
| JUL 1 | 18.0°C | 22.5°C | |
| JUL 2 | 18.0°C | 22.2°C | |
| JUL 3 | 18.0°C | 22.0°C | |
| JUL 4 | 18.0°C | 21.8°C | |
| JUL 5 | 18.0°C | 21.5°C | |
| JUL 6 | 18.0°C | 21.3°C | |
| JUL 7 | 18.0°C | 21.1°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 | 18°C | 23°C |
| August | 15°C | 19°C | 24°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
July 1
July 2
July 3
July 4
July 5
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.