The best area to stay in Ipanema is along the beachfront, particularly close to the areas known as Posto 8, 9, and 10.
This stretch of Ipanema offers direct access to the beach and the promenade, which is excellent for walks and views of the Dois Irmãos mountains. The main streets running parallel to the beach, such as Vieira Souto Avenue and EpitÔcio Pessoa Avenue (which borders the Lagoa Rodrigo de Freitas), are lined with high-end hotels and apartments. You'll find a good selection of restaurants, cafes, and shops within a few blocks of the beach.
Couples often find this area ideal for a romantic trip. Staying near Posto 9, for example, puts you close to many upscale dining options and boutique shops along Garcia d'Ćvila Street, great for an evening out after a day on the beach. The sunsets from this part of the beach are quite memorable.
For those who enjoy a slightly more residential feel but still want beach proximity, the blocks further back from the beach towards General Osório Square are a good option. This area is a bit quieter but still very well-connected, with easy access to the General Osório metro station and a Sunday street market.