Superagüi National Park is located on the northern coast of Paraná State, in southern Brazil, and is part of Iguape-Cananéia-Paranaguá estuary complex. The park is totally contained in Guaraqueçaba municipality, Paraná State. However, Paranaguá and Cananéia municipalities are also adjacent to the park. The park limits are within the latitudes 25º12'23"S and 25º29'19"S and longitudes 48º01'24" W and 48º20'36" W. 

The park is a total of 33,988 hectares and is made up of two islands (Superagüi Island makes up 41% of the park and Peças Island makes up 27%), the continental portion (19%), and the aquatic estuary environment and smaller islands like Pinheiro and Pinheirinho (the remaining 13%). Peças Island's topography is completely flat. Superagüi Island presents three elevations: Morro do Superagüi, Morro das Pacas, and Morro do Canudal, although the elevation differences are not significant. There is higher elevation on the continental portion; Bico Torto is the highest point at 575 m above sea level. Superagüi Island was originally a peninsula but became an island after a canal was built. The canal, Varadouro Canal, now separates the continent from the island. It was originally constructed to facilitate the boat trips between the towns of Cananéia and Paranaguá, to promote commerce (Vivekananda, 2001).

The climate classification of the region, according to Köppen, is Cfa or humid subtropical. The summer is hot; the highest temperatures occur in January (26.1o C is the monthly average); the coldest month is July (16.3o C is the average). Frosts are an uncommon occurrence. The annual precipitation is approximately 2,500 mm (IPARDES, 1990); there is no clearly defined dry season.

The park shelters estuarine environments, mangroves, caxetais, lowland forests, sub-montane forests, and arboreal, herbaceous and shrubby restingas. In addition, there is approximately 35 km of beautiful, pristine beaches with little or no human presence.

                          Superagüi mangroves and estuaries

                 Superagüi lowland forests and submontane forests

                            Superagüi restingas and pristine beaches

According to Dinerstein et al. (1995), 49% of Superagüi National Park is located in Serra do Mar Coastal Forest Ecoregion, and 41% is classified as Ilha Grande Mangrove Ecoregion. The remaining 10% is made up of the aquatic estuarine environments.

    

Map showing the two ecoregions of the park, Serra do Mar coastal forests and Illha Grande mangroves (Map produced by Gustavo Gatti, ParksWatch-Brazil/Fundação O Boticário)