Fishing in Rio Grande do Sul

Rio Grande do Sul is Brazil's southernmost state, sharing borders with Argentina and Uruguay.

The landscape runs from the basalt highlands and river canyons of the interior to a vast coastal plain where a complex system of lagoons, barrier islands, and estuaries stretches for hundreds of kilometres before meeting the Atlantic.

The temperate climate here means peacock bass don't survive the winters, which shapes the entire freshwater scene — this is a state where native species and introduced largemouth bass fill the role that tropical gamefish play further north.

The interior rivers are the heart of the freshwater fishing.

The Rio Uruguai and its tributaries — including the Rio Pelotas in the northeast and the Rio Ibicuí — hold dourado (Salminus brasiliensis) and pintado catfish, both of which draw serious sport fishers.

Dourado in particular are prized for their fight, and catch-and-release is widely encouraged.

The piracema (spawning protection period) on the Uruguai basin runs from October through January, so the open season for these species runs roughly February through September — check current rules with IBAMA or the SEMA-RS before you go, as the regulations are updated regularly and the two separate basin calendars can catch visitors off guard.

The jundiá, a native catfish abundant in farm ponds and rivers across the state, is probably the most widely caught fish here. Traíra are everywhere — açudes, banhados, slow river backwaters — and will hit surface lures aggressively.

For anglers looking to sharpen lure technique, the traíra is a reliable teacher. On the coast, Lagoa dos Patos dominates.

It's one of the largest barrier lagoons in the world, and the fishing inside it and along the adjacent coast shifted noticeably after a 2018 state law banned motorized trawling.

Fishers around Marinheiros Island and the municipality of Rio Grande report mullet, sole, Brazilian silversides, kingfish, and species — including grouper — that hadn't been seen in those waters for decades.

Seatrout and South American silver croaker are the main sport targets in the lagoon system. The legal status of the trawling ban has faced challenges at the federal level, so the situation bears watching from a conservation standpoint.

Further north, the "rosário de lagoas" — a string of lagoons running roughly 100 kilometres between Torres and Tramandaí along the northern coast — connects river drainages to the sea through narrow channels.

It's a distinct environment from the open Patos system, quieter and less documented, but worth exploring for coastal species. An amateur fishing licence is required and is issued through IBAMA.

The two-basin calendar system — Uruguai basin on one schedule, Guaíba/Jacuí and coastal drainages on another — means you need to know which watershed you're fishing before you assume the season is open. Get that sorted before you rig up.

What Rio Grande do Sul rewards most is patience with the local knowledge.

The best fishing here isn't loud or obvious — it's a jundiá on a farm pond at dusk, or a dourado turning in the current of the Pelotas, or mullet running thick through a lagoon that's slowly coming back to life.