What to do in Paris when it’s hot?

In August, Paris turns into a village. The streets near Galeries Lafayette and the Opéra are quiet, parks and riverbanks come gently to life, and the Parisians who stayed in the capital can finally breathe. Heatwaves can sometimes hit the city until around the Assumption (August 15th) in Paris.

Should you give up on the great monuments, strolls and cultural outings? Certainly not. Between underground sites, some museums, historic swimming pools, waterside walks and the many parks and gardens, some of them open all night, Paris has plenty of cool refuges that we are happy to share with you.

Paris in summer: enjoying the city even in extreme heat

Hot Paris, creative Paris: another way to experience the city

When the mercury rises, Paris changes pace. Time for early-morning walks, cultural breaks and open-air evenings.

Hôtel Opéra Liège offers several suggested routes on Google Maps to discover Paris on foot or with the electric bikes we rent out by the day: [link].

Leave Hôtel Opéra Liège and your air-conditioned room in the 9th arrondissement of Paris, follow boulevard de Clichy and enjoy the shade of the plane trees. Stop at one of the many Davioud benches along the central reservation, then fill your water bottle at a Wallace fountain, which provides fresh, drinkable water free of charge.

Wander along rue des Martyrs in the footsteps of Maurice Ravel or the famous wrestler André the Giant, sip a mint syrup with water or enjoy a glass of rosé in the middle of this picture-postcard scene, so typical of Paris and of the Saint-Georges district.

Head back down towards the Opéra district, then continue to the Canal Saint-Martin or to the Seine: with Paris Plages, swimming in Paris is allowed!

To make the most of your stay in Paris during a heatwave, visit the major outdoor historic monuments early in the morning and keep the afternoon for indoor spaces. The Eiffel Tower, Montmartre and the banks of the Seine are far more pleasant before the tour groups arrive and temperatures peak.

Near the Eiffel Tower, the Aquarium de Paris, set in the Trocadéro gardens, is an ideal cool-down break for families, with thousands of marine animals and a vast jellyfish gallery, all in an air-conditioned space.

When the temperature finally starts to drop, Paris regains all its energy. The riverbanks, rooftops and open-air cinema screenings then carry the day on late into the evening.

Planning your day to avoid the hottest hours

During a heatwave, the best Parisian itinerary is built around three parts of the day.

In the morning, between about 8 and 11 a.m., favour walks and outdoor visits. This is the time to discover the Eiffel Tower, the Haussmannian façades, the covered passages or the paths of Parc Monceau, whose trees and remarkable sculptures offer several shaded retreats.

From noon until the end of the afternoon, head to an air-conditioned museum, a historic church such as the Église de la Madeleine, or even the Catacombs or the Panthéon. Nothing stops you from going back to the hotel for a few hours either: a break, a walk-in shower and a drink on the rooftop of Hôtel Opéra Liège can transform the rest of your day.

Finally, many green spaces extend their opening hours in summer, and nearly 140 gardens remain accessible around the clock. The Buttes-Chaumont park, for instance, stays open all night, and in the half-light you will find Parisians whispering around improvised lamps.

Mistakes to avoid during a heatwave in Paris

The first mistake is keeping an overly ambitious schedule. In the middle of a heatwave, linking Montmartre, the Louvre, Notre-Dame and the Eiffel Tower on foot is no longer a stroll: it is an endurance test.

Also avoid long queues in the full sun. Booking your tickets and time slots considerably reduces the time spent outdoors.

Always keep a water bottle with you. Hôtel Opéra Liège has a water fountain and an ice machine, and Paris has around 1,300 water points and drinking fountains, as well as more than 1,400 places identified as cool islands. A city map lets you locate the nearest water points, misting stations, libraries, public facilities and shaded areas.

Taking refuge in Paris's natural coolness

The Catacombs: 14 °C all year round, the ideal visit during a heatwave

Twenty metres beneath the streets of Paris, the Catacombs offer a striking contrast with the heat outside. The temperature stays close to 14 °C all year round: in the middle of summer, a light jacket can even come in handy.

The route of about 1.5 kilometres takes you through the former quarry network and the history of the Parisian ossuary. The visit does require good mobility, however: you go down 131 steps, then climb back up 112, on a floor that can be uneven or damp. Booking a time slot is strongly recommended.

More than just a refuge from the heat, the Catacombs are a genuine dive into the underground history of the capital.

Churches and cathedrals: free coolness in the heart of Paris

The thick walls, the stone and the vast volumes of Parisian churches often keep the atmosphere milder than the surrounding streets. They offer quiet or musical breaks between two visits.

Depending on your route, you can step into the Église de la Madeleine, Saint-Augustin or Saint-Eustache.... Take a few minutes to admire the stained-glass windows, the sculptures and the architecture.

This option has the advantage of being simple and spontaneous: there is no need to set aside half a day for it. A short stop is often enough to recover before setting off again.

Swimming pools, bodies of water and water activities

The Joséphine Baker pool, floating on the Seine

Moored at quai François-Mauriac in the 13th arrondissement, the Joséphine Baker swimming pool is one of the most original in Paris. Its 25-metre pool floats directly on the Seine, and its roof can open in summer to reveal an outdoor area and a solarium with a view over the river.

The venue is very popular in the warm months. It is therefore best to check opening hours and access conditions before you go, or even to favour the morning or the end of the day.

Aquaboulevard: the water park of Paris

To spend several hours in the water, head to Aquaboulevard, in the 15th arrondissement. This large urban water complex brings together pools, wave pools, slides and outdoor areas open during the summer season.

It is particularly suited to family outings and groups of friends who want to devote a whole day to swimming in Paris.

Paris Plages: free swimming and activities from July 4 to August 30, 2026

In 2026, Paris Plages brings the Rives de Seine park and the Bassin de la Villette to life from July 4 to August 30. Access to the areas and to most of the activities is free.

At the Bassin de la Villette, visitors can enjoy supervised swimming, water activities, deckchairs and events organised along the quays. Swimming in Paris is possible every day from 11 a.m. to 9 p.m., subject to safety conditions and water quality, which is tested every day.

Museums and cultural venues to shelter from the sun

Musée d'Orsay: Impressionism and a cultural break

Housed in a former railway station, the Musée d'Orsay lets you spend several hours admiring masterpieces by Monet, Renoir, Degas, Van Gogh or Cézanne in an air-conditioned space.

Book your ticket in advance and start your visit as soon as it opens. You can then have lunch inside.
Note that the restaurants of Parisian museums are sometimes air-conditioned, so make the most of them!

The Louvre: finding the coolest rooms

With its hundreds of rooms, the Louvre can fill a morning or a whole day. However, contrary to popular belief, the temperature is not uniform throughout the palace. The museum states that the complexity of this historic building means air conditioning cannot be guaranteed in every space.

When you arrive under the Pyramid, ask the reception staff which rooms are the most comfortable on the day of your visit.

Rather than trying to see everything, choose a specific route: Egyptian antiquities, Italian paintings, the Galerie d'Apollon or the Napoléon III apartments. You will enjoy the works more while limiting unnecessary walking.

Exceptional events in Paris, summer 2026

Paris does not just offer ways to escape the heat: summer 2026 is also marked by several exceptional events. An international video game competition and a Harry Potter gathering let you discover the capital from a completely different angle.

Some of these events take place indoors or in the evening, when the temperature becomes more bearable. They therefore fit perfectly into a heat-friendly itinerary.

The Esports World Cup: Paris becomes the world capital of video games

From July 6 to August 23, 2026, Paris Expo Porte de Versailles hosts the Esports World Cup, one of the most important international video game competitions.

Over seven weeks, nearly 2,000 players representing more than 100 countries are set to compete in 25 tournaments across 24 disciplines. More than 200 international clubs are announced, playing competitive games followed around the world.

This esports World Cup is an especially good outing for the hottest hours. The competitions and events take place inside Paris Expo, out of the sun, so you can spend the afternoon gaming before stepping back outside in the early evening.

Even visitors who know little about esports can take advantage of the event to experience the atmosphere of the competitions, watch matches between professional players and explore the events organised around digital culture.

The programme varies from week to week and depends on the games in competition. It is therefore best to check the official calendar and book your tickets according to the finals or teams you want to see.

Back to Hogwarts: Harry Potter comes to the Château de Versailles

On Saturday, August 29, 2026, Harry Potter fans have a date in the Orangerie garden of the Château de Versailles for an exceptional edition of Back to Hogwarts (Retour à Poudlard).

Organised for the 25th anniversary of the release of the first film, this large official gathering offers several sessions of up to three hours each. The daytime event is free, but by registration only: no tickets will be handed out on site. Visitors can come in costume and even bring their own wand to take part in the activities and the big spell class.

Three time slots are planned during the day, with entry between 9 and 10 a.m., between 1 and 2 p.m., and between 5 and 6 p.m. In very hot weather, the last session will naturally be the most pleasant. A water bottle is allowed and can be refilled on site, but there is no food service inside the event.

In the evening, the gardens of Versailles will also host a special edition of the Grandes Eaux Nocturnes. The illuminated fountains will come alive to the music of the saga, ahead of a finale combining drones and pyrotechnic effects. This separate evening event has, however, already been announced as sold out, and the Back to Hogwarts day ticket does not give access to it.

Between the relative coolness of the gardens at the end of the day, the fountains and the world of the films, this event makes for a particularly magical end to the summer holidays.

Cooling down and treating yourself in the 9th

Artisanal ice cream and sorbets: neighbourhood addresses

After a walk between Pigalle and rue des Martyrs, an ice cream becomes almost a necessity.

At 54 rue des Martyrs, Glazed serves artisanal ice creams and sorbets in often original flavours, made in Paris. It has become one of the emblematic ice cream parlours of the 9th arrondissement.

The neighbourhood also has several ice cream parlours and pastry shops around rue des Martyrs, rue de Caumartin and the Grands Boulevards.
Among them Amorino Gelato, at 2 avenue de Villiers, still only a few minutes' walk from Hôtel Opéra Liège.
Fruit sorbet, creamy ice cream or a simple lemonade: the hardest part will probably be choosing.

Smoothie bars and shaded terraces in the 9th

For a lighter break, several coffee shops and juice bars in the neighbourhood serve smoothies, lemonades and iced drinks.

Causses, at 55 rue Notre-Dame-de-Lorette, is a delicatessen offering food prepared with fresh, seasonal products.

Our rooftop in the evening, when the heat fades over Paris

When the sun sets behind the rooftops, there is no need to rush off to the other end of the capital.

At the top of Hôtel Opéra Liège, our green rooftop is a calm, intimate hanging garden with a view over the rooftops of Paris. Open to hotel guests and their visitors, it is the place to have a drink, try the cocktails of our Honesty Bar or simply enjoy the gentle evening.

This is when Paris feels light again. The noise of the city fades, the temperature drops and the façades take on the colours of the sunset.
To make the most of this Parisian interlude, Hôtel Opéra Liège is offering a special offer this summer of up to 20% off!

Where to stay to survive the Parisian heat?

Choosing the right hotel becomes essential when visiting Paris in the middle of summer. A central location cuts down on travel, makes it easy to return for a rest during the hottest hours and to head out again in the evening without losing an hour in transport.

Located at 9 rue de Liège, in the heart of the 9th arrondissement, Hôtel Opéra Liège is close to Gare Saint-Lazare, the Grands Magasins, the Opéra Garnier and several metro lines. Its air-conditioned rooms, two tree-lined inner courtyards and green rooftop offer a real breather after a day in the capital.

From the hotel, you can devote the morning to monuments, the afternoon to museums or swimming, then enjoy the Paris of terraces and summer evenings once the heat fades.

Book your stay at Hôtel Opéra Liège and discover Paris in summer at your own pace, with cultural escapes, cool breaks and evenings on the rooftops.