There are summers when the choice of beach is a detail. This is not one of them: in July 2026, IPMA recorded unusually mild sea water along almost the whole Portuguese coast, around 22 degrees even on west-coast beaches, because the northerly wind that normally cools the Atlantic did not arrive.
There has rarely been a better time to tick off the best beaches in Algarve and the Alentejo coast.
This guide runs through the best beaches in Algarve and the Alentejo coast, from Alvor to Porto Covo, organised by the kind of trip: families with children, couples on a short break, anyone after nature and walking. And with one detail the usual round-ups leave out: at every one of them there is a Pestana hotel within walking distance, so you can leave the car parked and walk to your towel.
If you are after hidden stretches of sand that are hard to reach, we have already gathered them: Secret beaches to avoid the crowds in Portugal. Here we celebrate the opposite: the iconic beaches, well served and award-winning, where everything is at hand.
The beaches at a glance
Algarve: Três Irmãos and Alvor (Portimão) and Senhora da Rocha (Lagoa).
Alentejo coast: Tróia, Comporta, Melides, Carvalhal (Grândola) and Praia Grande de Porto Covo (Sines).
Quality mark: all with a Blue Flag in 2026.
Best time: the end of summer, when the sea reaches its maximum temperature.
Which are the best beaches in Algarve for families?
The western Algarve, between Portimão and Lagoa, concentrates what a family looks for in a beach: a wide stretch of sand, a gently shelving sea, beach facilities and accommodation within walking distance. It is also an area of confirmed excellence: the beaches of Portimão flew the Blue Flag for the thirty-ninth consecutive year in 2026.
Três Irmãos and Alvor: the great sands of Portimão
Praia dos Três Irmãos is the eastern end of the immense sands of Alvor and one of the postcards of the western Algarve, with golden cliffs, caves at water level and a calm sea. Two hotels lean out over it: the Pestana Alvor Praia, a five-star resort at the top of the cliff, goes straight down to the sand by lift and has 215 rooms, most of them facing the sea. The Pestana Blue Alvor Beach, on an all inclusive basis, sits in front of the beach, a few steps from the sand and close to the centre of Alvor’s village, with a kids club for children from four to twelve.
To the west, the sands change name to Praia de Alvor and gain the company of the estuary. The Pestana Alvor South Beach has the beach about 80 metres from the door, one minute on foot, and three infinity pools for the intervals between swims. The Pestana Dom João II goes further: it stands right on top of Praia de Alvor, ten minutes on foot from the centre of the village. It is no accident that we wrote that on All hotels lead to the beach in Alvor.
Senhora da Rocha: the sheltered cove of Porches
Between Porches and Armação de Pêra, Praia da Senhora da Rocha is a cove tucked between cliffs, with transparent water, a usually calm sea and a Blue Flag in 2026. The Pestana Viking watches it from the top of the cliff, surrounded by sea on three sides, and the sand is two minutes away on foot. It is the right choice for anyone who prefers a beach on a human scale to the great expanses of sand.
Why is September the smart month for the beach?
The sea warms slowly: the water temperature peaks at the end of summer, between August and September, and Algarve usually has the warmest water in mainland Portugal. In 2026 the reading rose even earlier, with the absence of the northerly wind leaving the sea unusually mild as early as July. September adds to this sea at its best the obvious advantages: fewer people on the sand, more availability to book and a light that photographers are grateful for. You can follow the water temperature in real time on the website of IPMA. And if you are travelling with children, choosing the right base is easier after our comparison: Family holidays in the Algarve: an honest comparison between Pestana Alvor South Beach, Pestana Dom João II and Pestana Carvoeiro.
What changes on the Alentejo coast?
North of Sines the setting changes: pine woods and rice fields instead of golden cliffs, dunes instead of cliff faces, small villages instead of marinas. The sea is a little cooler and more open, and that is the point. The quality holds: the Alentejo coast flies 28 Blue Flags in 2026.
Tróia and Comporta: the sands that never end
On the Tróia peninsula and along the Comporta coast lies one of the largest continuous stretches of sand in the country, with the beaches of Tróia-Mar, Tróia-Galé, Comporta and Carvalhal, all with a Blue Flag in 2026. Eleven beaches in Grândola also hold the Qualidade de Ouro award, given for water quality. To stay, the Pestana Tróia Eco-Resort spreads more than 360 villas and apartments over 120 hectares of nature reserve, with three exclusive beach accesses by wooden walkways. In Comporta, the Pestana Comporta Village brings together 75 villas, each with a private pool, about two kilometres from the sand. We covered this coast in more detail in our guide to Comporta, Tróia e Porto Covo.
Porto Covo: Praia Grande and the whitewashed village
Further south, Porto Covo is the postcard village of the Alentejo coast, with white houses trimmed in blue. Praia Grande de Porto Covo and Praia da Ilha do Pessegueiro have a Blue Flag in 2026, in the municipality of Sines, which flies four. The Pestana Porto Covo Village sits in the very centre of the village, with 174 units a few minutes on foot from the sands and the cafés on the square. We had already given the warning: Porto Covo: the next holiday hotspot in Portugal.
Which beach suits you? The decision table
| Beach | Municipality | Nearest Pestana hotel | Distance to the beach | Ideal for |
| Três Irmãos | Portimão | Pestana Alvor Praia and Blue Alvor Beach | Lift to the sand; a few steps | Families and total convenience |
| Alvor | Portimão | Alvor South Beach and Dom João II | 80 metres; right on the beach | Small children and the estuary |
| Senhora da Rocha | Lagoa | Pestana Viking | 2 minutes on foot | Couples and sheltered coves |
| Tróia-Mar and Tróia-Galé | Grândola | Pestana Tróia Eco-Resort | Direct walkways | Nature with comfort |
| Comporta and Carvalhal | Grândola | Pestana Comporta Village | About 2 km | Villas, privacy and quiet |
| Praia Grande | Sines | Pestana Porto Covo Village | Minutes on foot, in the village | Authentic village and walking |
To decide quickly, here is the summary by traveller profile.
- Families with small children. Alvor and Três Irmãos: a calm sea, wide sands and hotels with a kids club steps from your towel.
- Couples on a short break. Senhora da Rocha: a tucked-away cove, with the hotel on the cliff and the sand almost private outside high season.
- Holidays with no stress. The all inclusive at the Blue Alvor Beach, opposite the sand, sorts out meals, entertainment and beach in the same place.
- Nature and walking. Praia Grande de Porto Covo, with the wild Alentejo coast opening into coastal trails in both directions.
- Villa privacy. Comporta and Tróia: your own pool, dunes and the largest continuous stretch of sand on this list.
The right beach is waiting for you
From a lift that goes down the cliff at Três Irmãos to the walkways of Tróia, the Portuguese south has a beach for every summer, and September is the badly kept secret of those who already know. Check the award winners of the year on the official list from ABAE, take inspiration from Visit Portugal and choose your base at leisure: the towel is the one thing you cannot forget.
Frequently asked questions about the beaches in Algarve and Alentejo
The sands of Alvor, including Praia dos Três Irmãos, are a safe choice: a gently shelving sea, extensive sand and hotels with a kids club right by the beach, such as the Pestana Blue Alvor Beach. The cove of Senhora da Rocha is the more sheltered alternative.
The Alentejo coast hoists 28 Blue Flags in 2026. In Grândola ten beaches hold the award, among them Tróia-Mar, Tróia-Galé, Comporta and Carvalhal; in Sines, Praia Grande de Porto Covo and Praia da Ilha do Pessegueiro.
Yes, and it is usually at its highest point of the year: the sea temperature reaches its peak at the end of summer, and Algarve usually has the warmest water on the mainland. In 2026 the sea warmed even earlier than usual, according to IPMA.
Yes. The Pestana Dom João II stands right on top of Praia de Alvor, the Alvor South Beach is about 80 metres from the sand and the Porto Covo Village is in the centre of the village, minutes from the beaches.
It depends what you are after. Algarve gives you warmer water, more services and hotels right on the sand; the Alentejo coast trades that for dunes, pine woods, small villages and almost empty stretches of sand. With a week available, the ideal is to try both: they are less than two hours apart by car.
