Porto — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Porto (Portugal). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Porto help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Porto in the Atlantic Ocean today is 19°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
Water temperature in Porto has risen over the last week and month. Currently, the sea water at this location is slightly warmer than average for this day in previous years.
According to our forecast, Water temperature in Porto will be 17.5°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUL 9 | 17.0°C | 16.8°C | |
| JUL 10 | 17.5°C | 16.3°C | |
| JUL 11 | 17.2°C | 16.5°C | |
| JUL 12 | 17.4°C | 16.8°C | |
| JUL 13 | 17.4°C | 16.3°C | |
| JUL 14 | 17.4°C | 17.0°C | |
| JUL 15 | 17.7°C | 17.0°C | |
| JUL 16 | 18.3°C | 17.3°C | |
| JUL 17 | 19.0°C | 17.3°C | 19.0°C |
| JUL 18 | 17.3°C | 18.8°C | |
| JUL 19 | 16.8°C | 18.6°C | |
| JUL 20 | 17.0°C | 18.4°C | |
| JUL 21 | 16.8°C | 18.2°C | |
| JUL 22 | 16.8°C | 18.0°C | |
| JUL 23 | 16.8°C | 17.7°C | |
| JUL 24 | 17.3°C | 17.5°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.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Porto, located on Portugal’s Atlantic coast in the Grande Porto area, experiences sea temperatures that reflect its temperate maritime climate. The influence of the ocean and coastal currents keeps water relatively cool year-round compared with southern Portugal. Typical seasonal surface temperatures range roughly from 13–15 °C in winter, 14–17 °C in spring, 17–20 °C in summer, and 15–18 °C in autumn. The Douro River estuary near the city can show slightly different conditions, with estuarine and sheltered spots warming a little more than the open sea. Water clarity and temperature can also shift with wind, swell and river discharge, so local conditions vary day to day.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 13°C | 14°C | 16°C |
| February | 12°C | 14°C | 15°C |
| March | 12°C | 14°C | 16°C |
| April | 13°C | 15°C | 17°C |
| May | 13°C | 16°C | 19°C |
| June | 14°C | 17°C | 19°C |
| July | 14°C | 17°C | 20°C |
| August | 15°C | 17°C | 20°C |
| September | 14°C | 18°C | 21°C |
| October | 14°C | 17°C | 21°C |
| November | 12°C | 17°C | 19°C |
| December | 12°C | 15°C | 17°C |
* Click on a month to view detailed water temperature data.
Porto: Weather Forecast
July 18
July 19
July 20
July 21
Location, Beaches & Local Information
Nearby Beaches & Facilities
Praia Do Cabedelo Do Douro
Praia Cabedelo Do Douro
Praia Das Pastoras
Praia Do Ourigo
Praia Do Carneiro
Praia Dos Ingleses
Praia Da Luz
Praia Do Molhe
Praia Do Homem Do Leme
Swimming Conditions
Swimming and beach holidays around Grande Porto cater to a mix of visitors seeking both active water sports and relaxed seaside days. The summer months offer the warmest and most comfortable conditions for bathing, with surface temperatures commonly reaching the high teens to around 20 °C, while many visitors still find the water brisk compared with more southerly beaches. Lifeguarded beaches, tidal pools and the calmer waters near the river mouth provide options for less experienced swimmers, and the Atlantic surf makes the area popular for surfing and bodyboarding when waves are present. Those preferring warmer immersion may choose indoor pools or heated facilities, but for typical beachgoing, late June through August is the peak period for the most pleasant sea temperatures.