Cimeira Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Cimeira Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Cimeira Reservoir today is 19.4°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 |
|---|---|---|---|
| JUL 15 | 17.3°C | 20.0°C | |
| JUL 16 | 17.4°C | 20.0°C | |
| JUL 17 | 17.3°C | 20.0°C | |
| JUL 18 | 18.1°C | 20.0°C | |
| JUL 19 | 18.2°C | 20.0°C | |
| JUL 20 | 18.2°C | 20.0°C | |
| JUL 21 | 18.2°C | 20.0°C | |
| JUL 22 | 19.4°C | 20.0°C | |
| JUL 23 | 20.0°C | 19.4°C | |
| JUL 24 | 20.0°C | 19.5°C | |
| JUL 25 | 20.0°C | 19.5°C | |
| JUL 26 | 20.0°C | 19.5°C | |
| JUL 27 | 20.0°C | 19.6°C | |
| JUL 28 | 20.0°C | 19.6°C | |
| JUL 29 | 20.0°C | 19.6°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 | 1°C | 5°C | 8°C |
| February | 1°C | 5°C | 8°C |
| March | 4°C | 8°C | 11°C |
| April | 7°C | 11°C | 14°C |
| May | 9°C | 15°C | 21°C |
| June | 12°C | 18°C | 23°C |
| July | 14°C | 20°C | 25°C |
| August | 16°C | 21°C | 26°C |
| September | 12°C | 18°C | 23°C |
| October | 9°C | 13°C | 17°C |
| November | 5°C | 9°C | 13°C |
| December | 1°C | 5°C | 9°C |
Cimeira Reservoir: Water Temperature by Location
Cimeira Reservoir: Weather Forecast
July 22
July 23
July 24
July 25
July 26
July 27
Location & Local Information
The Albufeira da Barragem Cimeira in Vila Real District typically shows clear seasonal variation in surface water temperature. In winter months (December–February) surface temperatures commonly sit around 6–12 °C (43–54 °F), while spring (March–May) warms to roughly 10–18 °C (50–64 °F). Summer (June–August) brings the warmest conditions, with surface waters often between 18 and 25 °C (64–77 °F) and occasionally reaching the upper 20s °C (80–82 °F) in heat waves. Autumn (September–November) sees cooling back toward roughly 12–18 °C (54–64 °F). These ranges reflect typical reservoir behaviour in northern Portugal, though local weather, reservoir depth, and inflow can produce variation from year to year and with depth below the surface.
Swimming at Albufeira da Barragem Cimeira is possible in practice but subject to local rules, water quality and safety considerations. There are no universal national prohibitions on entering reservoirs, yet access may be limited by signage, dam operation zones, or concerns about water abstraction and contamination; lifeguards and formal facilities are often absent. For these reasons many visitors swim only during the warmest months when temperatures are comfortable and when authorities or posted notices permit it. Always check local signage and municipal guidance, be mindful of changing currents near outlets and structures, and avoid swimming where explicitly prohibited for safety or water-supply protection.