v256.0 · climate · PT · verified 2026-04
Portugal climate profile
Climate profile for Portugal — Köppen climate zones, seasonal temperature + rainfall, humidity, extreme weather, climate-change trajectory, air quality, best months for visiting + relocation, water security, and recent climate-policy changes.
Climate classification (Köppen)
Mediterranean (Csa, Csb) — mild wet winters, hot dry summers · Atlantic-moderated · Madeira + Açores subtropical Atlantic
Temperature + rainfall by season
| Winter temperatures | Lisbon: 11°C avg (5-15°C range) · Porto: 10°C (5-14°C) · Algarve Faro: 13°C (8-17°C) · Madeira Funchal: 18°C (14-22°C) — mildest in Europe |
| Summer temperatures | Lisbon: 22°C avg (16-28°C) · Porto: 19°C (15-25°C) · Algarve Faro: 24°C (18-30°C) · Évora interior 28°C (heatwave 40°C+ possible) · Madeira 22°C (steady) |
| Annual rainfall | Lisbon: 725 mm · Porto: 1,150 mm · Algarve: 500 mm · Madeira Funchal: 600 mm · Wettest Nov-Mar; driest Jun-Aug |
| Humidity | Atlantic coast moderate (60-75%) · Interior drier · Summer humidity manageable |
Climate zones within the country
Atlantic north (Porto, Minho) — wetter, milder · Central (Lisbon, Coimbra) — Mediterranean · Interior (Alentejo, Trás-os-Montes) — continental, extreme · Algarve south — driest, mildest winters · Madeira + Açores — Atlantic subtropical
Extreme weather + risks
| Extreme weather events | Wildfire risk Jun-Sep (Pedrógão Grande 2017 disaster, Algarve 2018) · Atlantic storms winter (Storm Daniel 2023) · Heatwaves intensifying (40°C+ becoming routine inland) · Drought severity 2017-19, 2022-23 |
| Air quality | Generally good · Lisbon 2024 mean PM2.5 ~10 µg/m³ (WHO target 5) · Wildfire smoke episodes Jul-Sep · Rural areas excellent |
| Water security | Stressed — multi-year drought 2022-24, mandatory restrictions Algarve · Climate-change-driven decline projected · Desalination expanding |
Climate change trajectory
Mediterranean Basin among world's climate-vulnerable regions · Annual mean +1.4°C since 1900 · Projected +2-4°C by 2100 (worst-case RCP8.5) · Coastal erosion accelerating · Wildfire season lengthening
Best months for visiting + relocation
| Best for visiting | Apr-Jun + Sep-Oct shoulder seasons — warm, sunny, manageable crowds · Summer Jul-Aug peak tourism + heat in inland · Winter mild for Algarve/Madeira |
| Best for relocation | Year-round; arrival May or September avoids peak heat + crowds |
Recent changes (2023-2026)
2024-25: Wildfire season management strengthened post-2017 disaster · 2022-24 drought severe (worst in 1,200 years per ranges) · Reservoir levels improving with 2024-25 winter rains · Heat-resilience building codes updated · Climate-Action Plan 2025-2030 implementing EU Fit for 55
Source: official Portugal meteorological agency · Last verified 2026-04
See also: Portugal country profile · climate atlas