Most of the year this city is easy for two people. Three periods are not, and all three are avoidable if you know they are coming.
Art Basel week in early December. In 2026 the fair ran 4 to 6 December, with VIP days from the 2nd and Miami Art Week fairs across the city from 30 November. For those ten days hotel rates roughly double, restaurants are full of people with expense accounts, Wynwood and the island are solid, and rideshare surges all evening. It is a wonderful week if you came for the art and an expensive disappointment if you did not.
The busiest weekends of mid-March. Spring break fills South Beach and the city has responded in recent years with security checkpoints, vehicle restrictions on and around Ocean Drive, and other measures that change from year to year. The mainland is largely unaffected, which is the useful fact: Wynwood, Little Havana, Brickell and the Grove carry on as normal. Look up what is in force for the dates you are considering before you commit to a room south of Lincoln Road.
Ultra and Miami Music Week in late March. Bayfront Park downtown closes to everything else, the surrounding streets close with it, rideshare becomes difficult at exactly the wrong hours and the transit authority runs extended service to cope. If your idea of an evening is a quiet dinner downtown, pick a different week.
When to come instead. Late April and May, or the first half of November. Warm water, long light, prices well off their peak, no festival distorting the city, and in November the humidity has broken without the winter crowds having arrived. Those are the best weeks of the year here for two people, and almost nobody says so.