Irun — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Irun, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Irun today is 17.2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 3 | 18.8°C | 18.0°C | |
| JUN 4 | 18.8°C | 18.0°C | |
| JUN 5 | 18.0°C | 18.0°C | |
| JUN 6 | 17.9°C | 18.0°C | |
| JUN 7 | 17.4°C | 18.0°C | |
| JUN 8 | 17.4°C | 18.0°C | |
| JUN 10 | 17.2°C | 18.0°C | |
| JUN 11 | 18.0°C | 17.2°C | |
| JUN 12 | 18.0°C | 17.3°C | |
| JUN 13 | 18.0°C | 17.3°C | |
| JUN 14 | 18.0°C | 17.4°C | |
| JUN 15 | 18.0°C | 17.4°C | |
| JUN 16 | 18.0°C | 17.4°C | |
| JUN 17 | 18.0°C | 17.5°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 | 22°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 | 11°C | 17°C |
| December | 4°C | 8°C | 12°C |
Irun: Weather Forecast
June 9
June 10
June 11
June 12
June 13
June 14
Location & Local Information
Irun is a border town in Gipuzkoa with no large, well-known inland lake used for regular bathing; instead the local water environment is dominated by the Bidasoa estuary and nearby coastal bays and small reservoirs in the surrounding hills. Typical sea and estuary temperatures along this stretch of the Bay of Biscay range from about 10–13 °C (50–55 °F) in winter, through 12–17 °C (54–63 °F) in spring and autumn, up to roughly 18–22 °C (64–72 °F) in summer (occasionally reaching around 23 °C / 73 °F on warm late-summer days). Small inland reservoirs or ponds in the region can warm more in summer, often 18–24 °C (64–75 °F), but cool to near 4–10 °C (39–50 °F) during the coldest months depending on depth.
Swimming in Irun itself is limited because there is no prominent lake beach; bathing is commonly done at nearby monitored coastal beaches and in designated areas rather than in the estuary proper. Some reservoirs and ponds permit swimming where local authorities post signs and water-quality monitoring is in place. Estuary or off‑beach swimming may be restricted for reasons of tides and currents, water quality or habitat protection, so seasonal lifeguard coverage and official bathing advisories determine whether swimming is allowed. Visitors should follow local signage and municipal water-quality updates before entering the water.