Best lakes around Cacia are defined by the region's proximity to the Ria de Aveiro and Pateira de Fermentelos. The Ria de Aveiro is a coastal lagoon system known for its extensive network of canals, rich biodiversity, and salt marshes, which significantly influence the local landscape and culture. Pateira de Fermentelos stands as a large natural freshwater lagoon, recognized for its ecological importance. These bodies of water provide diverse natural settings for exploration.
Last updated: October 4, 2026
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The Ria de Aveiro, in Portugal, is an estuary rich in biodiversity. This aquatic ecosystem is famous for its meandering canals, salt marshes and diverse fauna. This point, specifically, is on EN 327, which runs parallel to the Ria for long kilometers, offering incredible views.
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a beautiful, quiet bike route always with a view of the Ovar Canal, from time to time there are flamingos in the shallow water...
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The lagoon becomes narrower toward the North. Still some sandy beach coves right along the Eurovelo1 bike route offer safe and warmer water to swim than across the peninsula on the ocean side, particularly useful early in the season.
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The entire narrow peninsula separating the lagoon from the ocean is formed by a sand bank deposited off the prehistoric coastline that eventually closed in and filled with water. It is hugged by a wide road with a good shoulder for biking, all the way from the Sao Jacinto ferryboat dock at the southern tip, to Ovar in the north, with two small beach towns in between, worth a detour. To keep it straight, this section highlights the longest part, from the southern tip to Torreira. The middle section goes from Torreira to the bridge that crosses the lagoon to th east, and the norther section goes from the bridge to Ovar, where the peninsula ends. The Ria (lagoon) continues as a natural canal parallel to the coast for another 50 kilometer or so to the north.
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Right across from the entrance to the Sao Jacinto campground are several docks for the small, colorfully painted traditional lagoon fishing boats still used by local fishermen.
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On the lagoon side of the road the local fishermen continue to attach their traditional small shallow boats and also fish with rods from the wooden piers. On the other side a trailhead with picnic tables and restroom is a good rest area with a quick trail to a marshy pond in the nature reserve promising great birding opportunities.
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The coastal Eurovelo 1 bike trail runs along the large protected estuary. Partially on dedicated trail separated from vehicle traffic, partially sharing the shoulder of the road. It's nicest going south to north to always be closest to the water.
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Near Cacia, you can explore two distinct aquatic environments: the Ria de Aveiro, a vast coastal lagoon system often called the 'Portuguese Venice' with saline waters, and Pateira de Fermentelos, a significant natural freshwater lagoon. Both offer unique natural beauty and ecological importance.
The Ria de Aveiro is characterized by its intricate network of canals, rich biodiversity, and extensive salt marshes. It's a haven for numerous bird species and features diverse ecosystems including salt flats, untouched landscapes, and the nearby Costa Nova beach with its iconic striped houses. You can often spot flamingos in the shallow waters, particularly along routes like EV1 on the Ria de Aveiro.
Yes, the calm waters of the Ria de Aveiro are ideal for various water sports. Popular activities include stand-up paddleboarding (SUP), water skiing, wakeboarding, windsurfing, and hydrofoiling. Kayaking and paddleboarding are also widely enjoyed in the lagoons and coastal areas.
Yes, you can. The Lagoon beach ⛱️, located along the Eurovelo1 bike route, offers sandy coves with warmer water for swimming compared to the ocean side. Additionally, the freshwater Pateira de Fermentelos is known for inviting visitors to swim in its waters on hot days.
The Ria de Aveiro offers a rich cultural experience, deeply influenced by its history of fishing, salt production, and shipbuilding. You can take scenic guided tours on traditional, colorful Moliceiro boats, which were historically used for harvesting seaweed. These tours provide a unique perspective of Aveiro's canals, Art Nouveau architecture, old salt pans, and traditional houses.
Yes, several spots are considered family-friendly. The Torreira, Ria de Aveiro 🌊 CicloRia EuroVelo 1 and EV1 on the Ria de Aveiro are cycle ways suitable for families. The Lagoon beach ⛱️ provides safe, warmer waters for family swimming. Additionally, the Fishing docks and picnic trailhead at Cozinhas da São Jacinto offers picnic tables and a quick trail to a marshy pond, promising birding opportunities for all ages.
You can find various hiking opportunities near the lakes. For easy walks, consider routes like the 'Aveiro Central Canal – Aveiro Friendship Bridge loop' or the 'Boardwalk in Ria de Aveiro loop'. These are part of the Easy hikes around Cacia guide, offering pleasant strolls with views of the aquatic landscapes.
Absolutely! The Ria de Aveiro is excellent for cycling. The Torreira, Ria de Aveiro 🌊 CicloRia EuroVelo 1 is a popular coastal Eurovelo 1 bike trail that runs along the estuary, with sections separated from vehicle traffic. Another great option is the EV1 on the Ria de Aveiro, which offers incredible views of the Ovar Canal and opportunities to spot flamingos.
Pateira de Fermentelos is a significant natural freshwater lagoon, recognized as one of the largest on the Iberian Peninsula and a Ramsar site. Unlike the saline Ria, it offers a tranquil freshwater ecosystem, formed by the Cértima River. It's surrounded by lush forests and crossed by the crystalline Mau River, making it ideal for quiet walks, nature observation, and swimming.
Yes, there are. The Fishing docks and picnic trailhead at Cozinhas da São Jacinto offers picnic tables and restrooms, serving as a good rest area. Additionally, the Campground and fishing docks area provides facilities, and you can observe traditional lagoon fishing boats there.
The Ria de Aveiro is a haven for biodiversity, protected under the Natura 2000 network. You can expect to see numerous bird species, including protected ones like the purple heron, as well as otters, various amphibians, fish, crustaceans, and molluscs. Flamingos are often sighted in the shallow waters. Pateira de Fermentelos, as a Ramsar site, also supports a critical habitat for diverse aquatic and bird life.
Yes, the region offers several mountain biking trails. You can explore routes like the 'Ria de Aveiro Boardwalks – Aveiro – São Jacinto Ferry loop' or the 'Ria de Aveiro Cycle Path loop'. More options are detailed in the MTB Trails around Cacia guide, catering to various difficulty levels.


Still not found your perfect lake around Cacia? Check out the guides of these regions to see even more beautiful places.