The best time to travel to Rio de Janeiro, Buzios, Sao Paulo, and Salvador, is October to April. Iguazu Falls has a tropical climate and can be visited year-round. For the Amazon and Pantanal, the best time to travel is during the dry season, which runs from April to September.
What vaccinations are required for travel to Brazil?
The Centers for Disease Control and Prevention's website provides recommended and/or required vaccinations for each country. For Brazil, it recommends that you should be up-to-date with routine shots such as measles/mumps/rubella (MMR) vaccine, diphtheria/pertussis/tetanus (DPT) vaccine, and poliovirus vaccine, and that you get vaccinated for Hepatitis A and Typhoid, and Hepatitis B, depending upon your travel plans. Brazil does not require travelers to present proof of yellow fever vaccination. The CDC recommends Yellow Fever vaccination if you are traveling to the ENTIRE states of Acre, Amapá, Amazones, Distrito Federal (including the capital city of Brasília), Goiás, Maranhão, Mato Grosso, Mato Grosso do Sul, Minas Gerais, Pará, Rondônia, Roraima, and Tocantins; and the designated areas of the following states: northwest and west Bahia, central and west Paraná, southwest Piauí, northwest and west central Rio Grande do Sul, far west Santa Catarina, and north and west São Paulo. Vaccination is recommended for travelers visiting Iguazu Falls. Vaccination is NOT recommended for travel to the following coastal cities: Rio de Janeiro, São Paulo, Salvador, Recife, and Fortaleza. The CDC also suggests that you see a health-care provider at least 4-6 weeks before your trip to allow time for your vaccines to take effect.
What are the passport/visa requirements for American citizens traveling to Brazil?
U.S., Australian, and Canadian citizens require a passport valid for at least six months from date of entry, a stamped visa that is valid 90 days from the date of issue, an onward or return ticket, and sufficient funds to cover their stay. EU Citizens (except Cyprus, Estonia, Latvia, Lithuania and Malta, which require a visa) only require a passport valid for at least six months from date of entry, an onward or return ticket, and sufficient funds to cover their stay. Citizens of other countries are advised to contact the Brazilian embassy in their country before traveling.