Buzios or Armação dos Búzios is a coastal city in the Brazilian state of Rio de Janeiro. High Season is from November till March and June to July (local school holidays. Low season is from March till May and August till October. May and April can be a very good months to go because they are dry and quieter for families looking to relax.
December is the busiest month and it is great for parties, although you may face some lack of basics (water and food supplies) and prices rise substantially. Avoid going in March because it can be quite wet.
Búzios is notorious for its sophisticated and therefore expensive restaurants. The new big thing in Búzios is pay-by-the-kilo restaurants; the original was a place called Boom and now there are about 20 of them. Boom's the good one.