Caia Reservoir — Current Water Temperature, Annual Trends and Forecast

This page provides information on the current water temperature in Caia Reservoir, trends, monthly ranges and the forecast for the coming days.

Arrocampo Reservoir, Spain © By CNA, CC BY-SA 3.0

Current Water Temperature

24.3°C

Today

24.2°C

Yesterday

23.3°C

A Week Ago

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Water Temperature in Caia Reservoir today is 24.3°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

From June 21 to July 22

Table of Daily Sea Temperature Data

Date	Current	Average	Forecast
JUL 15	23.3°C	26.0°C
JUL 16	23.4°C	26.0°C
JUL 17	23.2°C	26.0°C
JUL 18	24.0°C	26.0°C
JUL 19	24.1°C	26.0°C
JUL 20	24.1°C	26.0°C
JUL 21	24.2°C	26.0°C
JUL 22	24.4°C	26.0°C
JUL 23		26.0°C	24.4°C
JUL 24		26.0°C	24.5°C
JUL 25		26.0°C	24.6°C
JUL 26		26.0°C	24.6°C
JUL 27		26.0°C	24.7°C
JUL 28		26.0°C	24.8°C
JUL 29		26.0°C	24.9°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	10°C	13°C
February	6°C	10°C	14°C
March	9°C	13°C	17°C
April	10°C	14°C	19°C
May	11°C	17°C	23°C
June	18°C	23°C	28°C
July	21°C	26°C	32°C
August	21°C	26°C	32°C
September	20°C	25°C	30°C
October	16°C	20°C	23°C
November	10°C	16°C	20°C
December	8°C	12°C	15°C

Caia Reservoir: Water Temperature by Location

🇵🇹 Portugal > Portalegre District

Caia Reservoir: Weather Forecast

July 23

° / °

clear sky

rain: 0% | wind:

July 24

° / °

mainly clear

rain: 0% | wind:

July 25

° / °

partly cloudy

rain: 0% | wind:

July 26

° / °

mainly clear

rain: 0% | wind:

July 27

° / °

mainly clear

rain: 3% | wind:

Location & Local Information

The Albufeira da Barragem do Caia, a reservoir in Portalegre District, shows the typical thermal behavior of inland Iberian reservoirs. Surface water temperature in summer commonly ranges from about 20–26 °C (68–79 °F), with the warmest, shallow bays occasionally reaching the upper end on hot, calm days. In spring and autumn temperatures are more moderate, roughly 12–18 °C (54–64 °F) in spring and 14–20 °C (57–68 °F) in autumn as the lake warms or cools. Winter surface temperatures tend to be noticeably cooler, often around 8–12 °C (46–54 °F). These figures vary with recent weather, reservoir level and depth: deeper water remains colder year-round and thermal stratification can keep bottom layers several degrees cooler than the surface.

Swimming at the Albufeira da Barragem do Caia is commonly practiced but is not universally regulated as a supervised bathing area, so whether it is allowed can depend on local rules and signage. Restrictions may be in place where the reservoir serves water supply, where water quality is monitored, or where safety hazards—such as steep banks, fluctuating water levels and submerged obstacles—exist. People who choose to swim do so at their own risk and should heed posted regulations, avoid restricted zones, and consider the seasonal water temperatures and lack of lifeguards when deciding to enter the water.

Nearby Lakes

Frequently Asked Questions

What is the current water temperature in Caia Reservoir?

Water Temperature in Caia Reservoir today is 24.3°C.

What is the water temperature in Caia Reservoir during the summer months?

The water temperature in Caia Reservoir in summer fluctuates in the range of 18°C - 32°C.

Is it possible to swim in Caia Reservoir (Portugal) and what are the possibilities for this?

Swimming is possible at the Caia Reservoir in Portugal in suitable, non‑restricted spots and is often paired with activities like bathing, kayaking/canoeing and shore fishing, but availability depends on local rules, water quality and safety conditions so visitors should follow signage and municipal guidance.