Swimming in Brazil in september 2025 Sea temperature by city in september

In september in Brazil swimming conditions vary by city. Details below:

In september in Fortaleza, Recife, Belem, Fernando de Noronha, João Pessoa, Ajuruteua (Bragança - Pará), Canoa Quebrada, Jijoca de Jericoacoara, Olinda, Lençóis Maranhenses National Park, Praia dos Carneiros, São Luis de Maranhão, São Miguel dos Milagres, Aracaju, Macapá, Maceió, Natal and Parnaiba, swimming conditions are perfect! With water reaching a maximum of 81°F and an average of 80°F, going in the water (and staying there!) feels great.

As for Rio de Janeiro, Guarapari, Paraty, Arraial d'Ajuda, Caraiva, Ilha Grande, Itacaré, Morro de São Paulo, Praia do Forte, Salvador de Bahia, São Mateus (Espírito Santo), Trindade, Angra dos Reis, Araruama, Cabo Frio, Caraguatatuba, Ilhéus, Itaguai, Lauro de Freitas, Macaé, Porto Seguro and Vila Velha, swimming is pleasant in september. The sea water is 71°F on average (min: 68°F/max: 74°F) so you can easily spend time in the water.

Swimming in september in Florianopolis (Santa Catarina Island), Ilha Comprida, Peruíbe, Praia do Rosa (Santa Catarina), Criciúma, Guaruja, Joinville and Paranaguá is possible but the sea is generally cool. So though the sea temperature may sometimes reach 69°F, it can also go as low as 64°F. Note that the average is 67°F.

Swimming in september in Porto Alegre and Tavares (Rio Grande do Sul) is possible... with a wetsuit! Indeed, the water is cold at this time of year with an average temperature of 62°F (min: 59°F/max: 65°F).

Forget about swimming in Pelotas in september! The water temperature is freezing, reaching as low as 53°F (and only 62°F at the best of times). Our advice: plan on sightseeing, and don't bring your beach towel!