Are there any lakes in Portugal? While Portugal is famous for its stunning coastline and sun-soaked beaches, the country also offers a selection of beautiful lakes and lagoons perfect for autumn getaways. From serene crater lakes in the Azores to expansive reservoirs on the mainland, these natural wonders are ideal for escaping the crowds and enjoying the crisp autumn air.
Whether you’re looking for a peaceful retreat, scenic hikes, or even swimming lakes in Portugal, here’s our guide to the best lakes and lagoons to explore this autumn.
Major lakes in Portugal perfect for an autumn break
The Great Lake, Alqueva
The Alqueva Reservoir, often called the Great Lake, is the largest lake in Portugal and one of the biggest man-made lakes in Europe. Spanning 250 km² across five municipalities in the Alentejo region, it’s a peaceful destination for autumn trips when the summer crowds have faded.
Visitors can explore historical castles such as Juromenha, Alandroal, Terena, Monsaraz, and Portel, or admire the spectacular viewpoints in Mourão and Moura overlooking the glistening waters. Autumn is an ideal season to enjoy boat tours, stargazing, and leisurely walks along the shore.
Travel tip: Pair your lake visit with a stay in nearby Alqueva and explore charming Alentejo villages.
Lagoa da Vela
Located near Figueira da Foz, Lagoa da Vela is a peaceful lagoon popular among kayaking and canoeing enthusiasts. Surrounded by wild landscapes, it’s an excellent spot for autumn hikes and birdwatching. After exploring the lagoon, spend the evening in Figueira da Foz sampling the region’s seafood and strolling along its beaches.
Lagoa do Fogo
Lagoa do Fogo on São Miguel Island in the Azores is a crater lake surrounded by a protected natural reserve. Its pristine waters and lush autumn foliage make it one of Portugal’s most scenic destinations for nature lovers. Hiking trails around the lake offer breathtaking viewpoints, while birdwatchers can enjoy spotting endemic species.
Lagoa das Sete Cidades
Also on São Miguel Island, Lagoa das Sete Cidades is a twin lake in the crater of a dormant volcano. Autumn is an especially magical time to visit, as the landscape is painted with golden and amber hues. Hike to the main viewpoint for panoramic views of the lakes and surrounding forests, or enjoy a calm boat ride on the water. Ponta Delgada, just 10 km away, is perfect for an overnight stay.
Pateira de Fermentelos
The largest natural lake in Portugal and the Iberian Peninsula, Pateira de Fermentelos sits between Águeda, Aveiro, and Oliveira do Bairro. Autumn is a beautiful time to visit, as the surrounding trees change colour, enhancing the lake’s reflective waters. The lake is rich in wildlife, making it a paradise for birdwatchers and photographers. Nearby Aveiro, known as the “Venice of Portugal,” offers charming canals, colourful boats, and delicious seafood.
Lagoa de Óbidos
Lagoa de Óbidos, a tidal saltwater lagoon on Portugal’s Atlantic coast, is one of the country’s largest and most accessible lakes. Autumn is ideal for peaceful walks along its shores or birdwatching as migratory species pass through. The nearby medieval town of Óbidos offers cosy restaurants, charming streets, and historic castles, making it a perfect base for your lake visit.
Lakes in the Algarve
The Algarve is mostly known for its beaches, cliffs, and resorts, but there are a few smaller lakes and reservoirs, such as Barragem de Bravura near Odiaxere. Autumn is a quiet time to enjoy these hidden gems, with opportunities for kayaking, picnicking, and photography without the summer crowds.
Swimming lakes in Portugal
Despite its coastal fame, Portugal has several lakes perfect for swimming. Some of the most popular options include:
- Lagoa das Sete Cidades, São Miguel Island – A volcanic crater lake with clear, cool waters.
- Lagoa do Fogo, São Miguel Island – Surrounded by protected natural areas, ideal for a refreshing dip.
- Barragem de Bravura, Algarve – A tranquil reservoir suitable for water sports.
- Barragem do Azibo, Northeast Portugal – Known for its sandy beaches and clear waters.
- Barragem de Alqueva, Alentejo – More famous for boating and fishing than swimming, but still accessible in designated areas.
Travel tip: Always check local swimming regulations and water temperatures, especially during autumn.
Autumn travel tips for Portugal’s lakes
Visiting Portugal’s lakes in autumn means fewer crowds, cooler temperatures, and stunning natural colours. It’s the perfect season for:
- Hiking and exploring lakeside trails
- Birdwatching and photography
- Quiet boat tours or canoeing
- Enjoying local cuisine in nearby towns
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