Cenote yearly water temperatures and recommended exposure protection.
This is always a difficult question to help divers with, everyone has different comfort levels. Personally for cavern tours, I wear a 3mm full length wetsuit between June and October and during the balance of the year I wear a 5mm full length suit. Weeks where I am in the water everyday, I will add a hood or just use my drysuit for a couple of days during the week to help with the chill. Keep in mind that I dive almost everyday, so even though the water temperatures look nice and comfortable remember back to your open water training where we learnt how efficiently water conducts heat away from our body.
We rent out 3mm shorty wetsuits, they are more than adequate for the majority of divers though if you know you get cold, you may need a full length 3mm plus a 3mm shorty over top. A good tip to remember is that a large amount of heat lose is through your head - up to 75% - so if your cold, put on a hood 'cause it makes a big difference.
Cenote Temperatures:
| Month |
Water Temperature Above 35' |
| January | 76 |
| February | 75 |
| March | 76 |
| April | 77 |
| May | 77 |
| June | 78 |
| July | 78 |
| August | 79 |
| September | 78 |
| October | 77 |
| November | 77 |
| December | 77 |
Ocean Temperatures
The water temperature ranges between 76 and 78 in the winter months (Dec, Jan, Feb); 78 and 80 in the Spring (March through May) and warms up to 82 - 84 in the summer months. Keep in mind that if you will be doing multiple dives over multiple days, you will probably chill towards the end of the week. A good all- around suit for reef diving is a full 3mm.