Lisbon in September: weather, events & things to do

September is one of the best months to visit Lisbon. Summer weather usually continues, but the city begins to feel slightly less intense than in July and August, especially later in the month.

If you're planning a trip, this guide covers Lisbon in September, including the weather, what to pack, events in 2026 and the best things to do.

What is the weather like in Lisbon in September?

September is typically warm and sunny, particularly during the first half of the month.

Visit Lisboa lists an average air temperature of around 26°C for the July-to-September period, while sea temperatures average around 19.5°C.

In practice, you can expect warm afternoons and generally comfortable evenings, although temperatures become less predictable towards the end of September.

Pack light summer clothes, comfortable walking shoes and sunscreen, but bring a light jacket for evenings.

Is September a good time to visit Lisbon?

Yes. September offers a good balance between summer weather and slightly calmer sightseeing.

It is still a popular travel month, so attractions such as Belém, São Jorge Castle and Sintra can remain busy. However, walking around neighbourhoods such as Alfama, Graça and Príncipe Real is generally more comfortable than during the hottest summer days.

If you're visiting for a short stay, our 2 days in Lisbon itinerary covers the main highlights without unnecessary travel across the city.

Best events in Lisbon in September 2026

September 2026 has a strong cultural calendar, with film festivals, live music, food events and outdoor activities.

MOTELx

The Lisbon International Horror Film Festival takes place from 3 to 13 September 2026, bringing Portuguese and international horror cinema to the city.

Festival Iminente

From 17 to 20 September, Festival Iminente returns to Marvila with music, visual arts, dance, urban culture, food and community projects.

Queer Lisboa

The Queer Lisboa International Film Festival runs from 18 to 26 September 2026, with a programme dedicated to queer cinema.

Operafest

If you're visiting early in the month, Operafest Lisboa & Oeiras’26 continues until 11 September, with opera performances in Lisbon and Oeiras.

Chefs on Fire Cascais

On 19 and 20 September, Chefs on Fire combines live music with food cooked over open fire in Cascais.

It is a good option if you want to combine your Lisbon stay with a day trip outside the city.

Sintra Bodyboard Pro Fest

From 2 to 6 September, Praia Grande hosts the Sintra Bodyboard Pro Fest, with international bodyboard competition and a strong surf atmosphere.

Concerts

September also includes several major concerts, including The Neighbourhood on 12 September, Ronnie Wood on 14 September, Sigur Rós on 17 September, Fat Freddy’s Drop on 23 September and Placebo on 29 September.

Things to do in Lisbon in September

September is ideal for combining sightseeing with outdoor activities.

Spend a morning exploring Alfama, walk along the river in Belém, visit Lisbon's viewpoints around sunset or book a boat trip on the Tagus.

It is also still a good month for the beach. Cascais and Costa da Caparica are easy options from Lisbon, while a day trip to Sintra works particularly well once temperatures begin to cool.

For more ideas outside the city, see our guide to the best day trips from Lisbon.

What to pack for Lisbon in September

Bring:

• light clothes for daytime;

• comfortable shoes;

• sunglasses and sunscreen;

• a reusable water bottle;

• a light jacket or overshirt for evenings;

• swimwear if you're planning a beach day.

You generally won't need heavy clothing, but checking the forecast shortly before travelling is worthwhile.

FAQ about Lisbon in September

Is Lisbon hot in September?

Usually, yes. Daytime weather is generally warm, especially during the first half of September.

Can you go to the beach in Lisbon in September?

Yes. September can still provide excellent beach weather, although Atlantic water temperatures remain relatively cool.

Is Lisbon crowded in September?

Lisbon is still busy, particularly at major attractions, but crowds generally begin to ease compared with peak summer.

Does it rain in Lisbon in September?

Rain is possible, particularly later in the month, but September generally still offers plenty of dry and sunny weather.

Is September expensive in Lisbon?

Accommodation can remain relatively expensive because September is still a popular travel period. Booking hotels and major attractions in advance is recommended.