September in Portugal marks the transition from summer to autumn, making it one of the most pleasant months to visit. The heat of August begins to ease, and the cooler evenings hint at the changing season. With mild temperatures, clear skies, and fewer tourists, September offers the perfect combination for a relaxing getaway.
This month is ideal for travelers who want to enjoy outdoor activities, cultural exploration, and Portugal’s beautiful coastline without the peak-season crowds. From the vibrant streets of Lisbon to the tranquil islands of Madeira and the Azores, Portugal in September promises a diverse range of experiences.
Regional Weather Variations in September
| Location | Average High Temperature | Average Low Temperature | Average Rainfall | Average Sunshine Hours |
|---|---|---|---|---|
| Lisbon | 28°C (82°F) | 17°C (63°F) | 25 mm | 9 hours |
| Porto | 26°C (79°F) | 15°C (59°F) | 40 mm | 7 hours |
| Faro (Algarve) | 30°C (86°F) | 19°C (66°F) | 10 mm | 10 hours |
| Funchal (Madeira) | 27°C (81°F) | 22°C (72°F) | 15 mm | 8 hours |
| Ponta Delgada (Azores) | 25°C (77°F) | 20°C (68°F) | 50 mm | 6 hours |
In northern Portugal, cities like Porto and Braga enjoy warm but comfortable weather in September. Daytime temperatures range from 23°C (73°F) to 26°C (79°F), with cooler nights averaging around 15°C (59°F). The Douro Valley’s vineyards begin their harvest season, making this an excellent time to explore the region’s stunning landscapes.
Central Portugal, including Lisbon and Coimbra, experiences mild and sunny days with average highs of 26°C (79°F) to 28°C (82°F). Evenings are pleasant, cooling to around 17°C (63°F). Coastal areas near Lisbon, like Cascais and Sintra, are ideal for day trips with their mild temperatures and breezy conditions.
The Algarve retains its summer charm in September, with daytime temperatures ranging from 28°C (82°F) to 30°C (86°F). Nights remain warm at around 19°C (66°F), and the region sees very little rain. Beaches are less crowded than in August, offering a more tranquil experience.
Madeira and the Azores have their own unique climates. Madeira enjoys temperatures between 24°C (75°F) and 27°C (81°F), with minimal rainfall. The Azores are slightly cooler, averaging 22°C (72°F) to 25°C (77°F), and can experience occasional rain showers. Both islands are ideal for outdoor activities, from hiking to whale watching.
Rainfall and Precipitation Trends
Rainfall begins to slightly increase in September, particularly in the northern and central regions. However, most of Portugal remains dry, with southern areas like the Algarve seeing little to no rain.
- Northern Portugal (Porto): 40–50 mm over 6–8 days.
- Central Portugal (Lisbon): 20–30 mm over 4–5 days.
- Southern Portugal (Algarve): Less than 10 mm over 2–3 days.
- Madeira: Light rain, around 15 mm.
- Azores: 40–60 mm over 8–10 days.
The occasional rain showers are usually brief and followed by sunshine, making them easy to plan around.
Sunshine Hours and Daylight in September
While daylight hours begin to shorten in September, there’s still plenty of time to enjoy outdoor activities. Portugal sees an average of 10–12 hours of daylight per day, with sunshine levels remaining high:
- Lisbon: 8–9 hours of sunshine daily.
- Porto: 7–8 hours of sunshine daily.
- Algarve: 9–10 hours of sunshine daily.
- Madeira: 8–9 hours of sunshine daily.
The pleasant weather and ample daylight make September perfect for sightseeing, beach trips, and exploring Portugal’s natural beauty.
Wind and Ocean Conditions in September
Portugal’s coastal regions enjoy light breezes in September, which help keep temperatures comfortable even on warmer days. Average wind speeds range from 10 to 18 km/h (6 to 11 mph), with stronger gusts along the Atlantic coast, especially in northern and western areas like Porto and Ericeira.
Ocean temperatures remain warm, making September ideal for swimming and water sports. Here’s a breakdown of average sea temperatures:
- Northern Portugal: 18°C (64°F) to 20°C (68°F).
- Central Portugal (Lisbon and surroundings): 19°C (66°F) to 21°C (70°F).
- Southern Portugal (Algarve): 21°C (70°F) to 23°C (73°F).
- Madeira and Azores: 23°C (73°F) to 24°C (75°F).
The Algarve’s beaches offer the best conditions for swimming and snorkeling, while Madeira’s natural pools and the Azores’ pristine waters are perfect for exploring marine life. Surfers will find consistent waves along Portugal’s western coast, particularly in Ericeira, Peniche, and Nazaré.
The Charm of September
September in Portugal is often described as a “golden month,” blending the best of summer’s warmth with the tranquility of early autumn. Beaches are less crowded, cities are more relaxed, and the countryside is alive with the vibrant colors of the grape harvest.
This transitional period offers an excellent opportunity to experience Portugal’s diverse landscapes. Coastal areas remain sunny and warm, while inland regions like the Douro Valley and Alentejo showcase a blend of golden fields, lush vineyards, and cooler evenings.
Activities to Enjoy in September Weather
The Algarve’s beaches are particularly inviting in September, with warm waters and fewer crowds than in July or August. Praia da Marinha, Praia do Camilo, and Praia de Benagil are perfect for swimming, sunbathing, and exploring sea caves. For water sports enthusiasts, the Algarve offers opportunities for kayaking, paddleboarding, and jet skiing.
In Madeira, natural pools like those in Porto Moniz and Seixal provide a unique coastal experience. The Azores, with their clear waters and abundant marine life, are ideal for snorkeling, diving, and whale watching.
Portugal’s historic cities are especially enjoyable in September, as cooler temperatures make walking tours and outdoor exploration more comfortable. Stroll through Lisbon’s Alfama district, visit the iconic Belém Tower, or enjoy panoramic views from São Jorge Castle. In Porto, explore the Ribeira district, cross the Dom Luís I Bridge, or indulge in a port wine tasting.
For countryside adventures, head to the Douro Valley to witness the grape harvest and enjoy scenic river cruises. Sintra’s palaces, gardens, and forested hills offer a magical escape just a short distance from Lisbon.
September Festivals and Events
Portugal hosts several festivals in September that highlight its rich culture and traditions:
- Festa das Vindimas (Harvest Festival): Celebrated in wine regions like Douro and Alentejo, this festival marks the start of the grape harvest with music, food, and wine tastings.
- Feira de São Mateus (Viseu): One of Portugal’s oldest fairs, featuring live music, exhibitions, and regional cuisine.
- Lisbon Design Week: A celebration of creativity, showcasing design, architecture, and art throughout Lisbon.
- Azores Whale Festival: Held in Pico, this festival celebrates the region’s marine heritage with activities and performances.
These events offer unique opportunities to experience Portugal’s culture while enjoying its beautiful September weather.
Packing Tips for Portugal in September
Packing for September requires preparation for warm days and cooler evenings. Essentials include:
- Bring breathable clothing for daytime wear and a light jacket or sweater for evenings.
- Pack comfortable shoes for walking tours or hiking trails.
- Don’t forget swimsuits, flip-flops, and a beach towel.
September offers a more relaxed and balanced experience than August, with cooler evenings and fewer crowds. Compared to October, September is warmer and sunnier, making it ideal for those seeking late summer vibes.