August in Portugal lands squarely in summer. Expect average daytime highs of 30°C (86°F) and overnight lows around 18°C (64°F) in Lisbon, with the Algarve typically two to three degrees warmer at 31°C (88°F). The Atlantic sits at roughly 21°C (70°F), and you can plan for about 11.5 hours of sunshine on a normal day. Long, hot, dependable. The Atlantic is at its warmest of the year.
FAQ
Is August a good time to visit Portugal?
Yes. Peak summer. The whole country is on holiday and the energy is contagious. The country is at its most alive, with festivals, long evenings and a warm Atlantic.
What should I pack for Portugal in August?
Light, breathable layers, swimwear, a hat and good walking shoes. Evenings near the coast can carry a sea breeze, so bring one light layer.
Will it rain a lot in Portugal in August?
On average, August sees around 1 days with some rain in Lisbon, often short showers between long sunny spells. The south is consistently drier than the north, and the Algarve in particular stays sunny on most days even in winter.