Ceira River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Ceira River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Ceira River today is 17.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 2 | 20.4°C | 22.9°C | |
| JUN 3 | 18.7°C | 22.9°C | |
| JUN 4 | 18.4°C | 22.9°C | |
| JUN 5 | 18.4°C | 22.9°C | |
| JUN 6 | 18.4°C | 22.9°C | |
| JUN 7 | 17.8°C | 22.9°C | |
| JUN 8 | 17.4°C | 22.9°C | |
| JUN 10 | 22.9°C | 17.7°C | |
| JUN 11 | 22.9°C | 18.0°C | |
| JUN 12 | 22.9°C | 18.2°C | |
| JUN 13 | 22.9°C | 18.5°C | |
| JUN 14 | 22.9°C | 18.8°C | |
| JUN 15 | 22.9°C | 19.1°C | |
| JUN 16 | 22.9°C | 19.3°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 | 7°C | 10°C | 13°C |
| March | 8°C | 11°C | 14°C |
| April | 9°C | 13°C | 18°C |
| May | 13°C | 18°C | 22°C |
| June | 17°C | 23°C | 28°C |
| July | 19°C | 24°C | 28°C |
| August | 20°C | 25°C | 28°C |
| September | 18°C | 23°C | 27°C |
| October | 13°C | 17°C | 19°C |
| November | 9°C | 13°C | 16°C |
| December | 7°C | 11°C | 14°C |
Ceira River: Water Temperature by Location
Ceira River: Weather Forecast
June 9
June 10
June 11
June 12
June 13
June 14
Location & Local Information
The Rio Ceira, in the Coimbra district, shows typical temperature patterns for a small Portuguese river: in winter the water usually cools to around 8–12 °C (46–54 °F), spring brings a rise to roughly 12–18 °C (54–64 °F), summer can warm shallow pools to about 18–26 °C (64–79 °F), and autumn temperatures commonly lie between 12 and 20 °C (54–68 °F). Local conditions alter these ranges significantly — shaded, deeper stretches stay colder year-round while shallow, sun-exposed pools warm fastest — and upland sources or groundwater inflows can keep some reaches noticeably cooler than nearby lowland sections.
Swimming is commonly practiced in calm, accessible spots along the Ceira, especially in summer when temperatures are most comfortable. There is not a single universal prohibition, but actual permission depends on land access, municipal rules, and posted signage; water quality and safety are the deciding factors. After heavy rain the river can become fast and hazardous, and agricultural or urban runoff can affect suitability for bathing. Anyone planning to swim should choose well-known, sheltered pools, observe local warnings, and be mindful of cold-water shock in spring or winter when temperatures fall toward the lower ranges.