Always warm. No wetsuit needed, sun protection is always good to have. In winter it can get a little colder so a rashguard or shorty can be used, nut never anything thicker.
Cancun is an island shaped as a 7. Therefore there are basically two possibilities: NW, N and NE winds can de ridden from the northern part of the seven. NE, ENE, E, ESE, SE and S, can be ridden from the longest part of the seven but then you have to deal with the waves and the shorebreak which is rather big and strong. Following down through the Mayan Riviera you can ride from NE to S, and sometimes there are reefs + or - close from the beach which in some cases can produce flat water. Winds are not very constant generally and can be ridden from 7-30, been mostly 12-18 knts. This during the winter months, December to March. March to May to June, mostly SE. July to August, rather no wind and September to December, hurricane season. Sideshore: NNE and SSW.
Cancun is on the peninsula Yucatan, which is between the Gulf of Mexico and the Caribbean Sea. Cancun has a big airport with flights from all over the world. Many flights from the US. From the airport just drive to the beach and find many accesses.
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