Mira River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Mira River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Mira River today is 23.3°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 |
|---|---|---|---|
| SEP 13 | 24.0°C | 25.0°C | |
| SEP 14 | 24.1°C | 25.0°C | |
| SEP 15 | 23.7°C | 25.0°C | |
| SEP 16 | 24.3°C | 25.0°C | |
| SEP 17 | 24.3°C | 25.0°C | |
| SEP 18 | 24.2°C | 25.0°C | |
| SEP 19 | 23.6°C | 25.0°C | |
| SEP 20 | 23.7°C | 25.0°C | |
| SEP 21 | 25.0°C | 23.4°C | |
| SEP 22 | 25.0°C | 23.5°C | |
| SEP 23 | 25.0°C | 23.6°C | |
| SEP 24 | 25.0°C | 23.6°C | |
| SEP 25 | 25.0°C | 23.7°C | |
| SEP 26 | 25.0°C | 23.8°C | |
| SEP 27 | 25.0°C | 23.9°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 | 9°C | 13°C |
| February | 9°C | 12°C | 15°C |
| March | 10°C | 14°C | 17°C |
| April | 12°C | 16°C | 18°C |
| May | 15°C | 19°C | 24°C |
| June | 19°C | 24°C | 28°C |
| July | 21°C | 25°C | 28°C |
| August | 22°C | 27°C | 28°C |
| September | 22°C | 25°C | 28°C |
| October | 14°C | 18°C | 20°C |
| November | 11°C | 15°C | 18°C |
| December | 9°C | 12°C | 15°C |
Mira River: Water Temperature by Location
Mira River: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Source:
• location Serra do Caldeirão, Portugal
• elevation approx. 470 m (1,540 ft)
Mouth:
• location Atlantic Ocean, Vila Nova de Milfontes, Portugal
Length 145 km (90 mi)
The Mira River (Rio Mira), flowing through the Beja District toward the Atlantic at Vila Nova de Milfontes, has water temperatures that reflect its Mediterranean climate and Atlantic influence. In winter months temperatures commonly sit around 12–14 °C (54–57 °F), rising in spring to roughly 14–18 °C (57–64 °F). During summer, surface and shallow pool temperatures often warm to about 18–24 °C (64–75 °F), while autumn typically brings a gradual cooling to approximately 14–20 °C (57–68 °F). Local conditions such as recent rainfall, depth, shade from vegetation and tidal influence near the mouth can shift these values by a few degrees.
Swimming in the Rio Mira is widely practiced and generally allowed in many public river beaches, natural pools and the calmer downstream reaches near the mouth, where accessibility and milder currents make bathing popular. However, permissions and safety depend on location: some stretches cross private land or protected habitats and may be restricted, and high flows after storms, underwater hazards, strong currents in narrow channels and occasional water-quality issues can make swimming unsafe. Visitors are advised to follow local signage, choose recognized bathing spots, and consider seasonal flow and temperature when planning a swim.