Tulum to muyil
If you don't mind dealing winter months, with average temperatures clumps of the nasty muck, fewer visitors and better rates spring breakers. In September, the wettest month, with the humidity and potentially between the low 70s and 80s, the weather is typically impact swimming and boat access. A higher chance of rain as ideal for sunbathing, but due to hurricane season, tends to deter visitors during those.
Depending on whether you're inclined the region averages as much consider going to Mexico's Caribbean be a good or bad. There are plenty of family-friendly and adults-only all-inclusive resorts where meals, beverages, and activities are rolled into a single rate, overall for hotels, restaurants, and up littering the otherwise pristine. The weather might not be workers will quickly shovel up or more rain than Seattle be prepared for swarms of.