August weather forecast
Porto, Portugal

August brings no relief from the intense summer heat in Porto, with temperatures edging slightly higher than in July. However, a slight increase in rainfall occurs, but with a mere 33mm (1.3"), it hardly dampens the summer spirit. Despite these showers, the city remains sunny with plenty of daylight hours. Tourism remains high with visitors to the city making the most of the warm weather seaside amenities.

Temperature

With average high and low temperatures of 25.7°C (78.3°F) and 15.9°C (60.6°F) respectively, August is Porto's warmest month.

Rainfall

In August, the rain falls for 5 days. Throughout August, 33mm (1.3") of precipitation is accumulated. Throughout the year, there are 147 rainfall days, and 1237mm (48.7") of precipitation is accumulated.

Sea temperature

In Porto, the average seawater temperature in August is 17.6°C (63.7°F).
Note: The majority find it unenjoyable to swim in 17.6°C (63.7°F). Breathing becomes tougher as the water temperature descends under 21°C (69.8°F).

Daylight

The average length of the day in August is 13h and 47min.
On the first day of August in Porto, sunrise is at 06:30 and sunset at 20:50. On the last day of the month, sunrise is at 07:00 and sunset at 20:08 WEST.

Sunshine

In August, the average sunshine in Porto is 9.5h.

UV index

June through August, with an average maximum UV index of 8, are months with the highest UV index. A UV Index of 8 to 10 symbolizes a very high health risk from exposure to the Sun's UV rays for the average person.
Note: A maximum daily UV index of 8 during August morphs into the following directions:
Protection is paramount; otherwise, swift harm can come to the skin and eyes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.