Piscina Oceânica de Oeiras

The Piscina Oceânica de Oeiras is a large outdoor lido at Praia da Torre, where the Tagus estuary opens into the Atlantic. It’s part of Oeiras Marina, a waterfront complex that also includes the marina itself and the Passeio Marítimo, Oeiras’s seafront promenade. The pools are run by Oeiras Viva, the council’s culture and sport company.

The water comes straight from the ocean, so it’s salty, but there are no waves, no currents and no sand to wade through. That’s the reason many Lisbon families come here instead of the beach next door: a toddler can sit in 40 centimetres of water while an older sibling queues for the diving boards, all inside one fenced area with lifeguards watching.

Oeiras Viva describes the pools like this:

• Main pool: about 1,500 m², between 1.2 and 2 metres deep. That’s too deep for most young children to stand in, so non-swimmers need armbands and an adult close by.
• Children’s pool: 330 m² and only 40 cm deep, which is ankle to knee height on most small children. This is the pool for babies, toddlers and nervous paddlers.
• Diving area: four boards at 70 cm, 2 m, 5 m and 7.5 m, over a diving pit 4.5 metres deep. The lifeguards can close one or more boards for safety or in bad weather, so don’t promise a jump from the top before you’ve seen it open.

In total there’s about 1,800 m² of salt water, treated with sodium hypochlorite (a form of chlorine). There are six ladders into the pools plus specially adapted steps for people with disabilities.

Around the pools there’s a wide lawn and a shared area with sunbeds and parasols, and a separate VIP area with its own sunbeds and parasols for those who pay more.

The ocean pool is a summer-only place. Oeiras Viva lists the season as June, July, August and September. In 2026 it opened for the season in late May, and the price page gives the hours as 9:30 to 19:00 every day, subject to change with notice. When we checked on 27 September 2026 the price page was showing “temporarily closed”, so treat late September as the end of the season and check before travelling in autumn.

On a hot August weekend the lido can fill up. The rules set a maximum capacity of 1,500 people and allow staff to refuse entry below that number for comfort or safety, so arriving early on a heatwave Saturday is sensible.

These are the 2026 prices on Oeiras Viva’s official price list. A half day is either the morning (9:30 to 14:30) or the afternoon (14:30 to 19:00).

Ticket	Full day	Half day
Children 4 to 11	€15	€10
Young people 12 to 16	€15	€12
Adults over 16	€20	€15
Seniors (65+)	€15	€10

Family tickets are the better deal for most families. They cover at most two adults plus children under 16, and you need proof that you’re related. For a full day: three people €40, four €55, five €70, six €85 and seven €100. Half-day family tickets run from €30 for three to €70 for seven.

VIP tickets give access to the VIP sunbed area: €25 a day for children and young people up to 16, €35 for adults (half day €20 and €25).

The price list starts at age 4 and doesn’t say what under-4s pay, so ask when you phone or at the ticket desk.

If you want to leave and come back on the same day, get a re-entry pass at reception first, or you’ll have to buy a new ticket.

The lido takes birthday parties with a minimum of 10 children; the birthday child and one adult go free. In 2026 party guests paid €15 a day or €10 for a half day for children up to 16, and €20 or €15 for adults. Parties must be booked in advance.

Schools and institutions can book on weekdays at least 30 days ahead, from €8 a day (€6 half day) per child up to 16, with one adult free for every 20 children. A home-education group large enough to count as a group could ask about this rate.

From the Piscina Oceânica rules published by Oeiras Viva:

• Children up to and including 14 can’t come in without an adult who is responsible for watching them.
• Babies must wear swim nappies in both pools.
• Everyone must shower and go through the footbath before walking onto the pool deck. No sun creams or oils that affect the water, so apply sun cream well before swimming.
• Proper swimwear and footwear are required at every age.
• Only armbands and rubber rings for children are allowed in the water. Inflatable mattresses, other inflatables, balls and water pistols are not.
• No jumping in except from the diving boards, and no running.
• Food and drink can’t go on the pool deck, apart from water and baby food for children up to 2. Meals must be eaten in the areas set aside for them, and a security company checks bags for food at the entrance.
• Changing rooms are separated by sex. Children over 8 must use the changing room for their own sex.
• No animals.

The rules don’t mention swim caps, which fits an outdoor lido. Check at the entrance if you’re unsure.

There’s a restaurant and a bar on site, and the wider Oeiras Marina has more cafés and terraces along the waterfront. Lockers are available. The lido sits on the Estrada Marginal, the coast road between Lisbon and Cascais, with a covered car park of 70 spaces, which won’t be enough on busy days.

There’s plenty of sun here and shade mostly comes from the parasols, so bring hats and a cover-up. The water is Atlantic seawater and can feel cold early in the season. The main pool is deep throughout, so a child who can’t swim should stay in the children’s pool or wear armbands with an adult beside them.

It’s a pricier day out than a municipal indoor pool: a family of four pays €55 for a full day. A half-day ticket in the afternoon is a cheaper way to try it.

If the children would rather have sand, Praia da Torre, the beach right next to the pools, has its own page with parking, access and lifeguard details. For a morning out of the sun, the Aquário Vasco da Gama in Dafundo is a short drive towards Lisbon. Climb Up in Carnaxide is an indoor climbing option in the same municipality for a cooler day. Further along the coast, the Carcavelos surf school runs lessons and holiday camps for children who want real waves.

Is there a baby or toddler pool at the Piscina Oceânica de Oeiras?

Yes. The children’s pool is 330 m² and 40 cm deep. Babies must wear swim nappies.

How much does it cost?

In 2026 a full day cost €20 for adults and €15 for children aged 4 to 16, with half-day tickets from €10. A family ticket for two adults and two children cost €55 for the whole day.

Can children go without a parent?

Only from 15. Children aged 14 and under must be with an adult who takes responsibility for them.

Can you bring a picnic?

Not onto the pool deck. Apart from water and baby food, food has to be eaten in the designated areas, and bags are checked at the entrance. There’s a restaurant and bar inside.

Is the water heated?

Oeiras Viva doesn’t say it’s heated. It’s seawater from the Atlantic, treated with chlorine.

When is it open?

From June to September, daily from 9:30 to 19:00 in 2026. It’s closed outside the summer season.