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Laguna Merín
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Laguna Merín, known in Brazil as Lagoa Mirim, is a massive coastal lagoon located on the border between Uruguay and Brazil's southernmost state, Rio Grande do Sul. Covering an area of approximately 4,250 square kilometers, it is the second-largest lagoon in South America. It is about 185 kilometers long and up to 37 kilometers wide. The lagoon is connected to the even larger Laguna de los Patos to the north by the São Gonçalo Channel. However, unlike Laguna de los Patos, Laguna Merín has no direct outlet to the Atlantic Ocean. Its waters are predominantly fresh, fed by several rivers, the largest of which is the Jaguarão (Yaguarón) River. The lagoon's surroundings are of great ecological and economic importance. The area is a designated Ramsar Wetland, supporting a rich biodiversity of birds, fish, and other wildlife, making it a vital habitat for conservation. Economically, the region around Laguna Merín is Uruguay's most important rice-growing area. The abundant fresh water from the lagoon and its tributaries is used to irrigate the extensive rice paddies that constitute a major part of Uruguay's agricultural exports.
- Location: Uruguay
- Nearby: Chuy (84 km)
Best time to visit & climate
The most pleasant time to visit is Mar, Nov, Dec.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 24 | 24 | 22 | 19 | 16 | 13 | 12 | 13 | 15 | 17 | 20 | 22 |
| Rain mm | 100 | 120 | 110 | 118 | 123 | 113 | 102 | 124 | 127 | 121 | 82 | 86 |
📋 Practical info
Getting there
This vast border lake is generally accessed via major national routes that lead to the coastal resort town, providing straightforward driving connections from most cities.
Best season
The warm summer period is typically identified as the peak season, offering the best conditions for swimming, sailing, and relaxing comfortably on the extensive beaches.
Terrain & paths
The immediate coastal environment features immensely long, flat sandy beaches that gently slope into the shallow waters, creating very easy and accessible walking areas.
What to bring
Typical beach necessities such as sun loungers, protective umbrellas, plenty of high-factor sunscreen, and perhaps basic water sports equipment are routinely recommended.
Parking
Ample and convenient parking is usually available throughout the adjacent resort town, often situated merely a short stroll away from the vast sandy shores.
Safety
The waters are generally considered exceptionally calm and very shallow near the shoreline, making it particularly safe for families, provided standard caution is applied.
Time needed
Due to the relaxing resort atmosphere, a typical visit often extends beyond a simple half-day, with many choosing to stay for an entire weekend or an extended holiday.
Geography
Facts
- Its area is approximately 4,250 square kilometers.
- It is the second-largest lagoon in South America.
- It is located on the border between Uruguay and Brazil.
- It has no direct outlet to the Atlantic Ocean.
- It is a designated Ramsar Wetland site.
- The region is Uruguay's most important rice-growing area.
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Notable places around
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Sights nearby
Frequently asked questions
What is Laguna Merín?
A large lagoon on the border between Uruguay and Brazil.
Is it developed for tourism?
There are some quiet resorts, but it is more of a destination for nature lovers.
Can one observe birds there?
Yes, the lagoon is an important protected area for many bird species.
Are there water sports?
Sailing and kayaking are popular, as the lagoon is quite shallow.
How is the infrastructure?
Rather simple and rustic; one should be prepared for self-sufficiency.
Laguna Merín: where is it located?
Laguna Merín is located in Uruguay.
Laguna Merín: when is the best time to visit?
The most pleasant time to visit is Mar, Nov, Dec.
Laguna Merín: why is it worth visiting?
Laguna Merín, known in Brazil as Lagoa Mirim, is a massive coastal lagoon located on the border between Uruguay and Brazil's southernmost state, Rio Grande do Sul.
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Nearby cities
Rocha
Rocha is the capital city of the RO department in Uruguay and the administrative center of the region.
Castillos
Castillos is an important city in the RO department of Uruguay, known for its role in the regional economy.
Lascano
Lascano is an important city in the RO department of Uruguay, known for its role in the regional economy.
Chuy
Chuy is an important city in the RO department of Uruguay, known for its role in the regional economy.
La Paloma
La Paloma is an important city in the RO department of Uruguay, known for its role in the regional economy.
La Pedrera
A chic seaside resort on a rocky peninsula, known for its excellent surfing conditions and winter whale watching.
La Coronilla
La Coronilla is a peaceful seaside resort in Rocha, famous for its wide sandy beaches and sea turtle conservation efforts.
Punta del Diablo
A picturesque fishing village with colorful wooden cabins and a relaxed bohemian atmosphere on the wild Atlantic coast.
Aguas Dulces
Aguas Dulces is a picturesque fishing village in Rocha, famous for its rustic beachfront houses and laid-back, bohemian vibe.
Valizas
Valizas is a legendary bohemian coastal village, famous for its massive sand dunes and its simple, nature-oriented lifestyle.
History & landmarks
Fort of San Miguel
A historic military fort on the border with Brazil reflecting the colonial past.
Fortress of Santa Teresa
An impressive colonial fortress near the coast, surrounded by a large national park.
Cabo Polonio Lighthouse
A historic lighthouse in the Cabo Polonio National Park, surrounded by a large sea lion colony.
Nature
Cebollatí River
One of the longest rivers in Uruguay, flowing into the Laguna Merín.
Laguna de Castillos
A shallow lake surrounded by palm forests, serving as an important refuge for migratory birds.
Laguna de Rocha
A protected body of water near the Atlantic, serving as a significant habitat for many bird species.
More places
Bañados del Este Wetlands
A vast swamp and lagoon system acting as a biosphere reserve protecting countless migratory birds.
Fortress of Santa Teresa
An impressive military fortress in the Rocha Department, started by the Portuguese in 1762.
Karumbé Sea Turtle Center
A conservation initiative at Cerro Verde that rescues and rehabilitates injured sea turtles.
Cabo Polonio National Park (Sea Lions)
This coastal area hosts one of the world's largest colonies of sea lions in the wild.
Laguna de Castillos Protected Area
Surrounded by a rare Ombu forest, this lagoon is a haven for numerous capybaras and water birds.
Cerro de la Buena Vista
A large sand dune offering a magnificent view over Cabo Polonio.
Port of La Paloma
An Atlantic port used for fishing, timber exports, and maritime tourism.
Laguna de Rocha Bird Sanctuary
A shallow coastal lagoon serving as a crucial habitat for black-necked swans and flamingos.