Many people want to do an Amazon cruise in Brazil. What are the choices and how do they differ?
One consideration is the frequency of operation

• a few big ocean liners might do one or 2 trips a year, maybe to Iquitos in Peru
• the Tucano offers cruises almost every week, from 5-7 days
• the Amazon Clipper and Premium offer weekly departures of 3,4 or 6 days
• The Grand Amazon offers weekly departures of 4 or 5 days
• the Jacare-Acu and Awape offer 4-8 day scheduled cruises throughout the year
• the Desafio is supposed to offer weekly 4 day departures
• there are many hammock boats and air-conditioned cabin boats available for private charter for any time and any length of time

When is the best time to visit the Amazon? That is a question that gets asked a lot.
One thing you have to consider is which part of the Amazon. Conditions in Peru at a particular time might be different than conditions in Brazil at the same time because the areas can be far apart. Since the area is so close to the equator, the temperature does not very much thoughout the year. The rainy season in the Peruvian Andes starts in about December and is heaviest in the Iquitos area in April. In the Manaus area, the rainy season is roughly mid-December till mid-May. In Ecuador, April to August is the rainy season (able to see more monkeys and birds), while August – March is the dry season (more mammals than birds).

In the old days, when there were not many people living on the Galapagos Islands, doing a cruise was the only way to see them, so there were not a lot of choices. Now there are 4 inhabited islands with accommodations on them, so there are more Galapagos tour options available.