Bilbao — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Bilbao, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Bilbao today is 18.1°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 2 | 18.5°C | 18.0°C | |
| JUN 3 | 18.0°C | 18.0°C | |
| JUN 4 | 18.0°C | 18.0°C | |
| JUN 5 | 17.7°C | 18.0°C | |
| JUN 6 | 17.4°C | 18.0°C | |
| JUN 7 | 18.1°C | 18.0°C | |
| JUN 8 | 18.1°C | 18.0°C | |
| JUN 10 | 18.0°C | 18.1°C | |
| JUN 11 | 18.0°C | 18.1°C | |
| JUN 12 | 18.0°C | 18.1°C | |
| JUN 13 | 18.0°C | 18.1°C | |
| JUN 14 | 18.0°C | 18.1°C | |
| JUN 15 | 18.0°C | 18.1°C | |
| JUN 16 | 18.0°C | 18.1°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 | 13°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 |
Bilbao: Weather Forecast
June 9
June 10
June 11
June 12
June 13
June 14
Location & Local Information
Bilbao, in the Basque Country of northern Spain, sits on the Nervión estuary rather than a large natural lake, but there are several reservoirs and inland lakes within driving distance that serve recreational and supply purposes. Surface temperatures in these bodies of water vary with the seasons: in winter they typically sit around 5–9 °C (41–48 °F), spring temperatures commonly rise to 9–15 °C (48–59 °F), summer surface readings often reach 16–24 °C (61–75 °F), and autumn usually cools to about 10–16 °C (50–61 °F). By comparison, the nearby Bay of Biscay and the estuary usually show milder summer sea-surface temperatures around 16–20 °C (61–68 °F), so inland reservoirs can warm slightly more on calm sunny summers.
Swimming is possible in some lakes and reservoirs near Bilbao but is governed by local rules and water quality considerations. Certain reservoirs allow bathing in designated zones when monitoring shows acceptable quality and lifeguard coverage is provided, while others restrict access because they are part of the drinking-water supply or present safety hazards such as steep banks and submerged structures. Seasonal factors also influence suitability: warmer summer temperatures make open‑water swimming more comfortable, whereas colder months carry hypothermia risk. Visitors should check current local signage and municipal guidance before entering any lake.