This data the coastal Vieira de Leiria 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.
Water temperature in Vieira de Leiria today is 18.3°C. Based on our historical data over a period of ten years, the warmest water in this day in Vieira de Leiria was recorded in 2021 and was 19.7°C, and the coldest was recorded in 2024 at 13.8°C. Sea water temperature in Vieira de Leiria is expected to be constant 18.3°C in the next 10 days. September average water temperature in Vieira de Leiria is 18.1°C, the minimum temperature is 13.8°C, and the maximum is 21°C.
Throughout the year, the water temperature in Vieira de Leiria does not rise above 20°C and therefore is not suitable for comfortable swimming. But on some days of August, September, October, the water temperature warms up to 20°C and above. The average water temperature in Vieira de Leiria in winter reaches 14.5°C, in spring 15°C, in summer the average temperature rises to 17.5°C, and in autumn it is 17.4°C.
5 September 2025 |
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today temp |
18.3°C |
4 September 2025 |
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yesterday temp |
18.5°C |
The sea salinity in Vieira de Leiria is 35.37‰, and the average salinity of the World Ocean is 35‰.
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 Vieira de Leiria. 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 Vieira de Leiria. Data in table shown for 5 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)
0-3 h | 3-6 h | 6-9 h | 9-12 h |
---|---|---|---|
6' 6" | 6' 2" | 5' 10" | 5' 7" |
1.97 m | 1.87 m | 1.78 m | 1.71 m |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
5' 5" | 5' 2" | 4' 10" | 4' 6" |
1.64 m | 1.57 m | 1.47 m | 1.38 m |
Data in a table show Vieira de Leiria temperature today (5 September 2025). For more information and forecast for a few days, go to the weather forecast Vieira de Leiria.
0-3 h | 3-6 h | 6-9 h | 9-12 h |
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![]() | ![]() | ![]() | ![]() |
15.6°C | 13.9°C | 12.9°C | 19.4°C |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
![]() | ![]() | ![]() | ![]() |
25.3°C | 24.6°C | 19.3°C | 13.8°C |
You may also be interested in other sections of our site for Vieira de Leiria: Sunrise and Sunset, Tides
These figures shows the average, minimum and maximum monthly sea temperature in Vieira de Leiria. 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 Vieira de Leiria 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
Month | Avr | Min | Max | |
---|---|---|---|---|
January | 14.4°C | 12.7°C | 16°C | cold |
Sea water temperature in Vieira de Leiria in January | ||||
February | 13.9°C | 12.3°C | 16°C | cold |
Sea water temperature in Vieira de Leiria in February | ||||
March | 14.1°C | 12.4°C | 15.8°C | cold |
Sea water temperature in Vieira de Leiria in March | ||||
April | 14.9°C | 13.2°C | 17.4°C | cold |
Sea water temperature in Vieira de Leiria in April | ||||
May | 16°C | 13.6°C | 18.9°C | cold |
Sea water temperature in Vieira de Leiria in May | ||||
June | 17.2°C | 14.5°C | 19.7°C | cold |
Sea water temperature in Vieira de Leiria in June | ||||
July | 17.6°C | 14.4°C | 20.4°C | cold |
Sea water temperature in Vieira de Leiria in July | ||||
August | 17.8°C | 15°C | 20.5°C | cold |
Sea water temperature in Vieira de Leiria in August | ||||
September | 18.1°C | 13.8°C | 21°C | cold |
Sea water temperature in Vieira de Leiria in September | ||||
October | 17.6°C | 14.5°C | 20.8°C | cold |
Sea water temperature in Vieira de Leiria in October | ||||
November | 16.4°C | 13.5°C | 19.3°C | cold |
Sea water temperature in Vieira de Leiria in November | ||||
December | 15.1°C | 13°C | 17°C | cold |
Sea water temperature in Vieira de Leiria in December |