Portugal in August: Weather, Crowds & What to Expect
Climate Map for August
Average temperature across Portugal in August.
City Weather in August
| City | High | Low | Rain | UV | Feels |
|---|---|---|---|---|---|
| Porto | 25° | 15° | 19 mm | very high | Mild |
| Braga | 26° | 14° | 28 mm | very high | Mild |
| Amadora | 27° | 17° | 8 mm | very high | Mild |
| Coimbra | 29° | 15° | 14 mm | very high | Mild |
| Leiria | 27° | 16° | 10 mm | very high | Mild |
| Setúbal | very high | ||||
| Funchal | 25° | 19° | 7 mm | extreme | Mild |
High / low are average daily temperatures (°C). “Feels” reflects how hot or cold it feels, allowing for humidity.
Northern Portugal (Porto, Minho, Douro)
August is one of the warmest months in northern Portugal: inland Douro can feel very hot and parched, with harvest staff preparing for September, whereas Porto summers are tempered by the sea breeze. Holiday crowds peak along the coast and small hotels book up, so reserve ahead if you want river cruises or surfing lessons. Hydration, a hat and suncream are essential for vineyard walks and hilltop viewpoints.
Central Portugal & Serra da Estrela (Coimbra, Aveiro, mountains)
August keeps the interior hot and dry - Alentejo-border areas can be particularly warm - while Serra da Estrela is a refuge with mild days and chill nights. Late summer thunderstorms occasionally roll through the highlands producing brief heavy rain and freshened air thereafter. This is festival season in many towns, so expect higher prices and book ahead; stay sun-safe and avoid exposed hikes in late-afternoon storm risk.
Lisbon & Tagus Valley (Lisbon, Cascais, Sintra, Évora)
August is the busiest tourist month: hot days in the Tagus Valley and packed beaches make for a bustling atmosphere, and coastal breezes help keep Lisbon bearable. Sintra gets relief from the heat under tall trees, but some inland spots like Évora remain very warm. Book accommodations well in advance, carry a refillable water bottle, and schedule strenuous sightseeing for morning or late afternoon.
Alentejo & Interior South (Évora plains, Alentejo hills)
August remains very warm, often mirroring July’s high temperatures, though coastal breezes from the south can moderate extremes nearer the Algarve border. This is a busy month for rural festival life and small-town feasts, with locals often scheduling events in the evenings. Reserve accommodation early and pack light, breathable clothes plus a long-sleeve layer for cooler nights.
Algarve (Faro, Lagos, Sagres, eastern coast)
August remains peak summer: very warm days, packed beaches and lively nightlife characterize the region, and the sea provides welcome relief. Occasional warm nights and higher prices are to be expected, and smaller villages can feel empty mid-afternoon as locals head to the coast. Organize accommodations well ahead, and carry hydration, shade, and late-evening plans to avoid the hottest hours.
Madeira (Funchal, levadas, high peaks)
August remains warm and dry, popular for sea activities and late-afternoon swims off Funchal’s pebbled coves. Afternoon cloud build-up over mountain tops can still bring brief showers but rarely disrupts plans for multiple consecutive days. Festivals and outdoor dining continue into the evening; pack summer clothing plus a thin jacket for breezy ridge-top viewpoints.
Azores (São Miguel, Pico, Faial, Flores)
August remains pleasantly warm with long daylight and calmer seas, ideal for inter-island ferry travel and marine wildlife tours; Pico’s Mount Pico climbs are popular and busy. Evening festivals and local events create vibrant island nights, but coastal paths are still quiet enough for serene walks. Bring sun protection and a light fleece for summit attempts, plus flexible schedules for occasional ferry rearrangements.