Aguíeira Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Aguíeira Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Aguíeira Reservoir today is 21.9°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 | 21.1°C | 26.4°C | |
| JUN 24 | 22.0°C | 26.4°C | |
| JUN 25 | 22.0°C | 26.4°C | |
| JUN 26 | 22.1°C | 26.4°C | |
| JUN 27 | 22.1°C | 26.4°C | |
| JUN 28 | 21.5°C | 26.4°C | |
| JUN 29 | 21.5°C | 26.4°C | |
| JUN 30 | 21.6°C | 26.4°C | |
| JUL 1 | 28.0°C | 22.2°C | |
| JUL 2 | 28.0°C | 22.5°C | |
| JUL 3 | 28.0°C | 22.8°C | |
| JUL 4 | 28.0°C | 23.1°C | |
| JUL 5 | 28.0°C | 23.4°C | |
| JUL 6 | 28.0°C | 23.7°C | |
| JUL 7 | 28.0°C | 24.0°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 | 6°C | 10°C | 13°C |
| February | 8°C | 12°C | 15°C |
| March | 9°C | 13°C | 17°C |
| April | 11°C | 15°C | 19°C |
| May | 15°C | 21°C | 26°C |
| June | 18°C | 26°C | 34°C |
| July | 23°C | 28°C | 34°C |
| August | 24°C | 29°C | 34°C |
| September | 22°C | 27°C | 33°C |
| October | 16°C | 20°C | 23°C |
| November | 10°C | 15°C | 19°C |
| December | 8°C | 11°C | 14°C |
Aguíeira Reservoir: Water Temperature by Location
Aguíeira Reservoir: Weather Forecast
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Location & Local Information
The reservoir known in Portuguese as Albufeira da Barragem da Aguíeira is a large inland lake in the Coimbra District whose water temperature varies markedly with the seasons. In winter the surface typically ranges from about 8–12 °C (46–54 °F), remaining brisk even on sunny days. Spring brings a gradual rise to roughly 12–18 °C (54–64 °F) as air temperatures warm and sunlight increases. Peak summer temperatures commonly reach about 20–25 °C (68–77 °F) in warm years, though shallower bays can occasionally climb a few degrees higher. In autumn the water cools back to around 14–19 °C (57–66 °F) as cooling air and river inflows lower surface warmth. These ranges reflect typical surface readings; deeper water remains colder year-round.
Swimming at Albufeira da Barragem da Aguíeira is practiced by locals and visitors but is not uniformly regulated, so allowance depends on location and local signage. Some designated coves and informal beaches are used for bathing during summer when temperatures are most comfortable, but there are areas where swimming is discouraged or restricted due to dam operations, sudden depth changes, boat traffic, or variable water quality after heavy rains. Lifeguards are not guaranteed, so swimmers should heed municipal notices, avoid areas near outflows or machinery, and be aware that reservoir conditions can change quickly despite pleasant surface temperatures.