Water temperature in Alentejo

This data the coastal Alentejo sea water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current sea temperature in Alentejo

Water temperature in Alentejo today is 17.8°C. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Alentejo was recorded in 2014 and was 20.4°C, and the coldest was recorded in 2024 at 15.8°C. Sea water temperature in Alentejo is expected to rise to 18.8°C in the next 10 days. September average water temperature in Alentejo is 18.7°C, the minimum temperature is 15.8°C, and the maximum is 22°C.

Throughout the year, the water temperature in Alentejo does not rise above 20°C and therefore is not suitable for comfortable swimming. But on some days of October, the water temperature warms up to 20°C and above. The average water temperature in Alentejo in winter reaches 15.5°C, in spring 15.7°C, in summer the average temperature rises to 18.2°C, and in autumn it is 18.1°C.

Alentejo water temperature now

The sea salinity in Alentejo is 35.65‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Alentejo for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Alentejo. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Alentejo. Data in table shown for 11 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Alentejo

Alentejo weather forecast

Current temperature and weather

Data in a table show Alentejo temperature today (11 September 2025). For more information and forecast for a few days, go to the weather forecast Alentejo.

0-3 h	3-6 h	6-9 h	9-12 h
19.3°C	18.9°C	18.6°C	20.3°C

12-15 h	15-18 h	18-21 h	21-24 h
22.3°C	23.1°C	22.5°C	20.5°C

Alentejo water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Alentejo. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Alentejo on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Alentejo

The nearest beaches and cities from Alentejo with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Santo Andre	17.7°C	23°C		1.51 m
Melides	17.8°C	23°C		1.51 m
Praia de Sao Torpes	17.5°C	23°C		1.65 m
Praia do Pego	17.7°C	27°C		1.03 m
Praia do Malhao	17.6°C	23°C		1.72 m
Setubal	17.6°C	27°C		0.85 m
Carvalhal Beach	18°C	27°C		0.85 m
Sesimbra	17.9°C	27°C		1.34 m
Almograve	17.4°C	23°C		1.75 m
Comporta	18.4°C	27°C		0.85 m

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Our report for Alentejo is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.