⛱️ Algarve season: warm water until October, Praia da Marinha and Benagil cave

The Algarve has been named the world's best beach destination. This is the region's fourth win at the World Travel Awards (as of tomorrowalgarve.com, 12/2025). People come here for the golden cliffs and the warm Atlantic, but many end up in August heat and pay double the price.

The southern coast of Portugal stretches along the Atlantic, and you can't cover it all in one trip. We've broken down the essentials: when the water is actually warm, where to swim in Albufeira and Portimão, and how to get into the Benagil cave, which is only accessible from the water.

When to go to the Algarve

💡 In short:

The swimming season runs from June through October, with September and October being the most comfortable.
Average water temperature in September is around 21 °C (as of 09/2026, seatemperature.info).
July and August bring heat, crowds, and the highest accommodation prices.

Autumn in southern Portugal is milder than in the rest of Europe. In September and October it's still warm, the water holds at its annual peak, and there are noticeably fewer people. You get the same beach without the parking lot line and at a calmer price.

From November to early spring, the air stays around twenty degrees. Few people dare to swim at this time, but you'll have the cliffs to yourself and soft light for photos. May works for walks, but the ocean is still cold.

The main season kicks off in July. That's when the Algarve gets scorching hot, crowded, and overpriced. If you're tied to school holidays, come in the last week of August: the water is warm and the crowds are already starting to thin out.

Algarve sandy beach with waves and people

Why the Algarve's beaches are considered the best

The ocean has carved arches, pillars, and grottoes into the cliffs. Wherever you stay on the southern coast, you'll find a beach with golden walls and turquoise water nearby. Many people have seen these shots in tourism campaigns without even knowing it's Portugal.

Algarve sandy beach with cliffs and ocean

Next, take the cliff trail along the edge. The paths are rough, but the views from above are worth it. From the Miradouro dos Arcos Naturais da Praia da Marinha lookout you'll see massive arches on one side and a beach that ranks among the ten most beautiful beaches in Europe according to the Michelin Guide (as of Wikipedia).

Go down to Praia da Marinha beach itself as well. There's a restaurant with an ocean view, parking is available, and you can take a dip in the cool Atlantic. The beach sits roughly halfway between Albufeira and Portimão, so it's easy to reach from both towns.

How to get into the Benagil cave

The grotto with an opening in its ceiling has become the region's signature landmark. You can only get inside from the water: by boat, kayak, or SUP. There's no way to walk down to it, so choose your approach in advance.

Panorama inside Benagil Cave with boats and beach

Two-hour boat cruises to the cave depart from the Portimão waterfront and from Albufeira. Right at the grotto, prices for a boat trip are higher, while from Albufeira the deals can be better. Compare offers before heading out to sea and don't buy a tour at the first ticket office you see.

The grotto can also be viewed from above, but stepping beyond the railing for a photo is dangerous. In autumn the waves are calmer, and you have a better chance of getting inside without the crowds. Take a kayak in the morning: by midday the wind and boats make the entrance noisy and cramped.

Albufeira: beaches and nightlife

Back in the fifties, Albufeira was a fishing village. Today it is a major resort town, where in summer the number of visitors is many times greater than the number of locals. White houses with terracotta roofs and the azure ocean create a postcard picture.

Pau da Bandeira viewpoint

The Pau da Bandeira viewpoint sits above the town, and an escalator takes you up to it. From here you can see the entire bay, the tiled roofs, and the ocean to the horizon. In the evening people come here to watch the resort lights and take panoramic shots.

Old town and eastern notes

The historic part of the town retains Arab influence, hence its eastern character. Today the center belongs to tourists: street after street, block after block, an endless string of restaurants and shops. Getting lost here is hard, but choosing a place for dinner is difficult.

Aquário restaurant with terrace in Albufeira Old Town

© Kolforn ( Kolforn ) I'd appreciate if you could mail me (Kolforn@gmail.com) if you want to use this picture out of the W · CC BY-SAPhoto: Kolforn ( Kolforn ) I'd appreciate if you could mail me (Kolforn@gmail.com) if you want to use this picture out of the W, CC BY-SA (https://creativecommons.org/licenses/by-sa/4.0), Wikimedia Commons

Evening after sunset

For fans of nightlife, Albufeira is convenient: almost every bar has live music in the evening, plus karaoke and clubs. If you want a quiet evening, head away from the main street toward the cliffs, where the music is much fainter.

Praia do túnel and praia dos pescadores

The lanes of the old town lead straight to Praia do Túnel beach. An arch tunnel really does lead to it. Beyond it begins Praia dos Pescadores, and together they form a wide beach area in the center of town. In the morning it is less crowded; by day you have to hunt for a sunbed.

Fishermen's Beach sand and building on the cliff

Portimão: beaches and viewpoints

Portimão is roughly the same size as Albufeira, but its historic center looks more modest and quieter. The reason is its location: the town sits a couple of kilometers from the ocean, which is what people come here for. On the plus side, the local beaches are less hectic, and dinner costs less.

Take note of the Igreja de Nossa Senhora da Conceição church: a stork has built a nest on its roof, and it is fun to watch. The church is modest on the outside, although it was modeled on the Batalha monastery, and its appearance was changed by an earthquake. It is also worth stopping by the Museu de Portimão further down the street.

Town square with monument and fountain in Portimão

Zona Ribeirinha de Portimão

Next to the historic center, a promenade has been built along the Arade River. Boat cruises to the Benagil grotto depart from here. A stroll along the promenade will take you half an hour if you are in no hurry, and in the evening the lights come on and summer cafes open.

Panorama of Portimão waterfront and Arade River

Museu de Portimão

By the pier, the Museu de Portimão operates in a former cannery building, and its exhibition tells the story of the fishing industry. Opening hours: Tuesday from 2:30 PM to 6:00 PM, Wednesday to Sunday from 10:00 AM to 6:00 PM, closed on Monday, and on Sunday from 10:00 AM to 2:30 PM admission is free (as of 09/2026, Portimão city council, official museum website). The schedule changes before holidays, so check it in advance.

Praia da Rocha

Praia da Rocha stretches along the cliffs, fragments of which float in the ocean. The beach area is fully equipped: sunbeds, restrooms, wooden walkways, and cafes. If you need infrastructure close to your hotel, this is the main beach in the area.

Fortaleza de Santa Catarina

Near the beach stands the Fortaleza de Santa Catarina fortress with an ocean-view lookout. On the other side of Praia da Rocha is the Miradouro dos Três Castelos viewpoint, and behind it hides a small beach with the same name.

Along the cliff top runs a long promenade lined with shops, restaurants, and bars. Life here is calmer than in Albufeira, but you can find dinner on every corner.

Praia do Amado and Praia do Vau

Don't stop at the beaches closest to the main street, keep going. Praia do Amado and Praia do Vau are prettier and noticeably less crowded, and they're easier to reach by car.

Praia do Vau sandy beach with ochre cliffs

At low tide the ocean recedes, revealing arches, grottoes, and stone formations in the water along the Portimão lagoons. Check the tide table for low tide times. Bring water and non-slip shoes: after low tide the rocks are wet.

Albufeira or Portimão: which to choose

Both towns sit on the southern coast and work well as a base for a week. The difference is in the pace and what's near your hotel.

What we compare	Albufeira	Portimão
Atmosphere	a lively resort until morning	a calm town by the river
Main beach	Praia do Túnel, Praia dos Pescadores	Praia da Rocha, Praia do Vau
In the evening	live music, bars, clubs	restaurants on the cliff-top promenade
Culture	old town and viewpoint	Museu de Portimão, Fortaleza de Santa Catarina
Best for	those who want everything nearby	those who want quieter and cheaper

Water parks near the resorts

Albufeira and Portimão both have large shopping centers, and two amusement parks operate between the towns. Zoomarine Algarve combines water slides, shows, and marine enclosures (official website). Slide & Splash is more about slides and pools for kids (official website). If you're traveling with children, plan a full day for each park.

⁉️🤔 Frequently asked questions

Can you swim in the Algarve in October?

Yes, in October the ocean gradually cools down, but swimming is still comfortable, especially on sunny days. In the evening it gets chilly on the cliffs, so bring a windbreaker.

How do you get to the Benagil cave?

Only from the water: by boat, kayak, or SUP. There is no walking path down to the grotto.

How much time should you allow for Praia da Marinha?

Plan for half a day. You will reach the viewpoints, go down to the water, and have lunch at a restaurant overlooking the ocean. In the morning the parking line is shorter and the light on the cliffs is softer, so arrive early.

Do you need a car in the Algarve?

For Albufeira and Portimao a car is not essential: beaches and restaurants are nearby. Praia da Marinha, cliff trails, and lagoons are more convenient with a car. Rent a car for two or three days, and walk the rest of the time.

Which should you choose: Albufeira or Portimao?

If you are traveling with family, choose the quieter Portimao, and come to Albufeira for the evenings.

In short: what to book

If you are going for photos, set aside a separate day for Praia da Marinha and the Benagil grotto.

Book accommodation in advance, rent a car for the cliff roads, and check the museum's opening hours before you set off.

Algarve beaches: when to go, where to swim and what to see