November and early December are great times to visit Tulum since the weather is pleasant (temperatures range from the low 70s to low 80s) and the crowds are thinner than they are in late winter and early spring.
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The rainy season in Tulum lasts from June to October, with August and September being the rainiest, these two months have the best hotel and airplane rates throughout the year.
Good weather, great prices – The shoulder months of May, July and August are some of the best times of the year to explore Tulum if saving a few dollars and having more space for your beach towel are dealbreakers. Local hotel rates and airfare to the Riviera Maya tend to be lowest during these less-crowded months.
Tulum experiences extreme seasonal variation in monthly rainfall. Rain falls throughout the year in Tulum. The month with the most rain in Tulum is September, with an average rainfall of 6.3 inches. The month with the least rain in Tulum is March, with an average rainfall of 1.3 inches.
Average annual water temperature on the coast in Tulum is 82°F, by the seasons: in winter 80°F, in spring 81°F, in summer 84°F, in autumn 84°F. Minimum water temperature (79°F) in Tulum it happens in January, maximum (86°F) in September.
Sargassum season in the Mexican Caribbean typically runs from May through October, with July and August generally being the worst months for its arrival.
In Mexico, sargassum seaweed season is generally between May and October each year. If you travel to the Caribbean coast of Mexico outside of that time period you can generally avoid large mats of seaweed on the beaches. Cancun to Tulum seaweed map in March 2022. Credit: Red de Monitoreo del Sargazo de Quintana Roo.