Ranhados Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Ranhados Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Ranhados Reservoir today is 18.7°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 |
|---|---|---|---|
| AUG 24 | 21.6°C | 23.0°C | |
| AUG 25 | 21.6°C | 23.0°C | |
| AUG 26 | 21.5°C | 23.0°C | |
| AUG 27 | 19.1°C | 23.0°C | |
| AUG 28 | 19.1°C | 23.0°C | |
| AUG 29 | 18.9°C | 23.0°C | |
| AUG 30 | 18.7°C | 23.0°C | |
| AUG 31 | 18.7°C | 23.0°C | |
| SEP 1 | 20.0°C | 18.8°C | |
| SEP 2 | 20.0°C | 18.8°C | |
| SEP 3 | 20.0°C | 18.9°C | |
| SEP 4 | 20.0°C | 19.0°C | |
| SEP 5 | 20.0°C | 19.0°C | |
| SEP 6 | 20.0°C | 19.1°C | |
| SEP 7 | 20.0°C | 19.2°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 | 10°C |
| February | 3°C | 7°C | 10°C |
| March | 6°C | 10°C | 13°C |
| April | 9°C | 13°C | 17°C |
| May | 12°C | 18°C | 23°C |
| June | 14°C | 20°C | 25°C |
| July | 17°C | 22°C | 27°C |
| August | 18°C | 23°C | 28°C |
| September | 14°C | 20°C | 25°C |
| October | 11°C | 15°C | 19°C |
| November | 7°C | 12°C | 15°C |
| December | 3°C | 7°C | 11°C |
Ranhados Reservoir: Water Temperature by Location
Ranhados Reservoir: Weather Forecast
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Location & Local Information
Albufeira da Barragem de Ranhados is a freshwater reservoir in the Guarda District whose surface temperatures vary noticeably with the seasons. In winter the water commonly sits between about 6 and 10 °C (43–50 °F), rising through spring to roughly 8–16 °C (46–61 °F). In summer, surface temperatures can reach approximately 18–25 °C (64–77 °F) on warm spells, while autumn typically brings cooling to the 12–18 °C range (54–64 °F). These are approximate surface values; deeper water will remain colder year‑round and thermal stratification can produce sudden temperature changes a few metres below the surface.
Swimming opportunities at Albufeira da Barragem de Ranhados depend on local rules and conditions. While informal bathing and recreational use often occur in the warmer months when surface temperatures are most comfortable, swimming in reservoirs is frequently discouraged or restricted for reasons including water‑supply management, variable water quality, the absence of lifeguards, submerged hazards and risk of cold‑water shock from sudden depth changes. Visitors should therefore check current municipal signage and local authority guidance before entering the water, and exercise caution even in summer conditions.