Vilarinho das Furnas Dam — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Vilarinho das Furnas Dam, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Vilarinho das Furnas Dam today is 18.3°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 | 18.6°C | 18.0°C | |
| SEP 14 | 18.8°C | 18.0°C | |
| SEP 15 | 18.5°C | 18.0°C | |
| SEP 16 | 18.7°C | 18.0°C | |
| SEP 17 | 19.5°C | 18.0°C | |
| SEP 18 | 19.6°C | 18.0°C | |
| SEP 19 | 18.3°C | 18.0°C | |
| SEP 20 | 18.1°C | 18.0°C | |
| SEP 21 | 18.0°C | 18.3°C | |
| SEP 22 | 18.0°C | 18.3°C | |
| SEP 23 | 18.0°C | 18.3°C | |
| SEP 24 | 18.0°C | 18.2°C | |
| SEP 25 | 18.0°C | 18.2°C | |
| SEP 26 | 18.0°C | 18.2°C | |
| SEP 27 | 18.0°C | 18.2°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 | 3°C | 7°C | 9°C |
| February | 3°C | 7°C | 9°C |
| March | 6°C | 9°C | 12°C |
| April | 9°C | 12°C | 15°C |
| May | 10°C | 15°C | 20°C |
| June | 13°C | 18°C | 22°C |
| July | 15°C | 19°C | 24°C |
| August | 16°C | 20°C | 25°C |
| September | 13°C | 18°C | 22°C |
| October | 10°C | 14°C | 17°C |
| November | 7°C | 11°C | 14°C |
| December | 3°C | 6°C | 10°C |
Vilarinho das Furnas Dam: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
The Barragem de Vilarinho das Furnas, in Braga District, creates a scenic reservoir set among northern Portugal’s hills. Water temperatures vary seasonally and are influenced by altitude, inflow and weather. In winter the surface commonly ranges from about 6–10 °C (43–50 °F), spring usually warms to roughly 10–16 °C (50–61 °F), summer surface temperatures often reach 18–25 °C (64–77 °F) on sunny days, and autumn cools back toward 12–18 °C (54–64 °F). Deeper layers remain colder year-round, so water can feel chilly even in summer. Temperature swings between day and night, and after rains, can be noticeable.
Swimming in the reservoir does occur, but it is largely informal and regulated by safety and operational considerations. Because the site is a working reservoir with variable currents, submerged obstacles and areas close to dam infrastructure, there are restrictions near the dam and in zones managed for water supply or power generation; official lifeguards and marked bathing areas are generally absent. Local authorities may prohibit access in specific sections, and water quality can vary after heavy rains. For those choosing to swim, it is advised to check local rules, avoid restricted zones, be mindful of cold-water shock and undertake precautions, treating the activity as at-your-own-risk rather than as organized beach swimming.