Caia River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Caia River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Caia River today is 23.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 4 | 22.9°C | 22.0°C | |
| AUG 5 | 22.9°C | 22.0°C | |
| AUG 6 | 22.8°C | 22.0°C | |
| AUG 7 | 22.9°C | 22.0°C | |
| AUG 8 | 22.9°C | 22.0°C | |
| AUG 9 | 22.8°C | 22.0°C | |
| AUG 10 | 23.6°C | 22.0°C | |
| AUG 11 | 23.8°C | 22.0°C | |
| AUG 12 | 22.0°C | 23.7°C | |
| AUG 13 | 22.0°C | 23.6°C | |
| AUG 14 | 22.0°C | 23.5°C | |
| AUG 15 | 22.0°C | 23.4°C | |
| AUG 16 | 22.0°C | 23.4°C | |
| AUG 17 | 22.0°C | 23.3°C | |
| AUG 18 | 22.0°C | 23.2°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 | 5°C | 9°C | 11°C |
| February | 5°C | 8°C | 12°C |
| March | 8°C | 11°C | 14°C |
| April | 9°C | 13°C | 18°C |
| May | 9°C | 14°C | 20°C |
| June | 15°C | 19°C | 24°C |
| July | 18°C | 22°C | 27°C |
| August | 18°C | 22°C | 27°C |
| September | 17°C | 21°C | 26°C |
| October | 13°C | 17°C | 19°C |
| November | 9°C | 13°C | 17°C |
| December | 7°C | 10°C | 13°C |
Caia River: Water Temperature by Location
Caia River: Weather Forecast
August 12
August 13
August 14
August 15
Location & Local Information
Source:
• location Serra de São Mamede, Portugal
Mouth:
• location Guadiana River, near Badajoz, Spain
The Rio Caia, a tributary in the Portalegre District of eastern Portugal that feeds into the Caia reservoir, has water temperatures that vary notably with the seasons. In winter the river and reservoir typically cool to about 8–13 °C (46–55 °F). Spring temperatures rise to roughly 12–18 °C (54–64 °F) as air temperatures warm and flow increases. In summer, when recreational use is most common, surface water often reaches 20–26 °C (68–79 °F) in sheltered stretches and the reservoir, though deeper or faster-flowing sections remain cooler. Autumn sees a gradual decline, with temperatures generally between 14–20 °C (57–68 °F) depending on recent weather.
Swimming in the Rio Caia area is possible in many places, especially in calmer, shallower parts of the river and around the Caia reservoir during the warmer months, but it is not uniformly unrestricted. Local regulations, water-quality conditions, seasonal fluctuations in reservoir levels, submerged obstacles and occasional strong currents or algal growth can make particular spots unsafe or prohibited. Visitors should follow posted signage, respect private property and municipal rules, and consider that water in rivers and reservoirs is often colder and less predictable than coastal sea temperatures.