Summer brings comfortable temperatures from the mid 70's F to mid-80s F with occasional highs in the mid-90s F. Come September, you'll find breezy days, rain, and temperatures in the 70s F, with a slight chill near the ocean.
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July is a fantastic month to visit Portugal. This is the hottest month of the year for the majority of Portugal, and is a wonderful month for a beach holiday or city break.
Portugal weather in August. The weather in August will be hot. In the Algarve you can expect over 12 hours of sunshine per day, while in Lisbon temperatures will be sizzling, and even Porto will be pleasantly warm. The intense summer sun means that the interior of Portugal will be too hot for sightseeing.
In July and August – the Algarve's hottest months – the average temperature is around 28°C (82°F), though some days can get as hot as 40°C (104°F). With cool ocean breezes, evening temperatures hover around 22°C (72°F) – perfect for comfortable outdoor dining.
Summer Weather in Lisbon, PortugalSummertime sees Lisbon heating up, literally, with average temperatures reaching upwards of 28ºC (82ºF), although they reach as high as 35ºC (95ºF).
July tends to be one the hottest months of the year in Lisbon. However, high temperatures are almost always tempered with a north sea-breeze, that may become windy in the afternoon.
With almost no rainfall across June, July and August, the Algarve is dry through the summer months with the long days (peaking at 12 hours of sunlight in July) and near-zero cloud cover leaving a very warm climate. Temperatures can hit as high as 30°C in July, ranging upwards from the mid-20s.
The summers host the greatest number of festivals and carnivals and this season is also the local holiday season, making it a wonderful time for tourists to visit cities like Lisbon, Porto, Braga and Evora. Naturally, this is the peak season in Portugal with millions of tourists flocking the country.
Portugal has a mediterranean climate with hot dry summers and mild winters. If you enjoy hot perfect sunny days the best time to visit Portugal is between June and August. The hottest month of the year is July with an average daily maximum of 30 C and an average low of 22 C.
If you want a beach vacation where you can explore a small area, then Portugal is probably best for you. However, if you're looking to explore multiple large cities with historical attractions, then Spain might be more of your style. That being said, Spain has plenty of beaches, too.