How Hot is Lisbon in August? Daytime high temperatures during August tend to be near 28-29 C (82-84 F), however, about 5 afternoons will reach up to 32 C (90 F) or more.
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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.
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).
Summer months are the most crowded and expensive in the coastal areas. Beach towns (such as Nazaré and along the Algarve) are packed with vacationers in July and especially in August — when rates go sky-high and it can be tough to find a room.
While there are definitely far more beautiful places to see in Portugal, from Óbidos to the Berlengas Islands to Monsanto and beyond, there's no doubt that you can cover a bigger percentage of Portugal's top destinations in one trip than you can Spain's.
So, how many days to explore Lisbon? We always recommend that it takes three days to fully explore Lisbon. This is sufficient to visit all of the characterful districts, experience the nightlife and join a couple of unique activities.
Red zone: it is in the streets of Baixa, Chiado and in some main avenues, such as Liberdade, Berna, Joao XXI and part of Republica. It has a maximum time of 2 hours and is €1.60 per hour.