Do any of these rooms have a/c?
When we were there none of the rooms had a/c, but the ocean breeze and the ceiling fans were more than enough to keep the room plenty cool both day and night.
Not sure, we had two pretty nice rooms both of them were without a/c. We were there in September and did not even miss it, fans were enough.
Get an answer from Posada Lamar staff and past guests.
3 Days in Tulum
Romantic Guide to Tulum
Guide to Tulum Outdoors