The best time to visit Cozumel is from March to May. During these months, you can expect warm but not too warm temperatures and the lowest chance of rain. Daytime temperatures range from 80?F to 85?F, sea temperatures average 79?F to 82?F and the humidity is a manageable 78-80%.

The "sweet spot" for visiting Cozumel in 2026 is between March and June. During this window, the winter "North" winds have subsided, and the oppressive humidity and peak hurricane season of late summer have not yet arrived. The water visibility for diving and snorkeling—Cozumel’s primary draw—is at its absolute best during these months, often exceeding 100 feet. If you are looking for the most pleasant weather, December through February offers cooler temperatures and lower humidity, but you risk "Nortes" (strong cold fronts) that can close the ports and cancel boat tours. Budget-conscious travelers might consider September or October, but this is the height of hurricane season and involves a significant gamble with the weather. For those interested in local culture, visiting during Carnival (typically February) provides a vibrant, high-energy experience, though you should book accommodations at least six months in advance to avoid surge pricing and limited availability.