Alcántara Dam — Current Water Temperature, Annual Trends and Forecast

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

Covão dos Conchos Lake, Portugal © By larahcv, CC0

Current Water Temperature

19.8°C

Today

20.3°C

Yesterday

24.3°C

A Week Ago

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Water Temperature in Alcántara Dam today is 19.8°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

From May 9 to June 9

Table of Daily Sea Temperature Data

Date	Current	Average	Forecast
JUN 2	22.7°C	23.0°C
JUN 3	22.1°C	23.0°C
JUN 4	21.7°C	23.0°C
JUN 5	21.0°C	23.0°C
JUN 6	20.9°C	23.0°C
JUN 7	20.3°C	23.0°C
JUN 8	19.8°C	23.0°C
JUN 10		23.0°C	20.0°C
JUN 11		23.0°C	20.1°C
JUN 12		23.0°C	20.3°C
JUN 13		23.0°C	20.4°C
JUN 14		23.0°C	20.6°C
JUN 15		23.0°C	20.8°C
JUN 16		23.0°C	20.9°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	15°C	20°C
May	11°C	18°C	25°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	15°C	20°C
December	8°C	12°C	15°C

Alcántara Dam: Water Temperature by Location

🇪🇸 Spain > Extremadura

Alcántara Dam: Weather Forecast

June 9

° / °

clear sky

rain: 0% | wind:

June 10

° / °

clear sky

rain: 0% | wind:

June 11

° / °

mainly clear

rain: 0% | wind:

June 12

° / °

overcast

rain: 5% | wind:

June 13

° / °

overcast

rain: 4% | wind:

June 14

° / °

overcast

rain: 15% | wind:

Location & Local Information

The Alcántara reservoir (Embalse de José María de Oriol) in Extremadura shows marked seasonal variation in surface water temperature, influenced by its large volume and Mediterranean climate. In winter the surface typically falls to about 6–12 °C (43–54 °F). During spring temperatures rise to roughly 12–20 °C (54–68 °F) as solar heating increases. Summer brings the warmest conditions, with surface water commonly ranging from 20–28 °C (68–82 °F) and occasionally reaching around 30 °C (86 °F) in heat waves; deeper layers remain much cooler year-round. Autumn cooling tends to produce intermediate values near 15–22 °C (59–72 °F). Because it is a deep, reservoir body, thermal stratification and colder currents near intakes or the dam can make local temperatures markedly lower than surface readings.

Swimming at Alcántara is possible in many accessible coves and shore stretches, but it is subject to local rules and safety considerations rather than being universally unrestricted. Authorities may close areas temporarily for water-quality issues, algal blooms, low water levels, or maintenance of hydroelectric and irrigation infrastructure; zones immediately adjacent to the dam, intake structures or heavy boat traffic are often prohibited for safety. Visitors should therefore obey signage and municipal guidance, be aware of sudden currents from releases, and prefer supervised or clearly designated bathing spots.

Nearby Lakes

Frequently Asked Questions

What is the current water temperature in Alcántara Dam?

Water Temperature in Alcántara Dam today is 19.8°C.

What is the water temperature in Alcántara Dam during the summer months?

The water temperature in Alcántara Dam in summer fluctuates in the range of 18°C - 32°C.

Is it possible to swim in Alcántara Dam (Spain) and what are the possibilities for this?

Swimming in the Alcántara reservoir is possible in permitted areas and sheltered inlets when water quality and conditions are suitable, but bathing is often restricted near the dam, intakes and navigation zones, so visitors should follow local signage and regulations and favor designated or supervised spots and organized water‑sport options for safety.