Are cenotes cold?
Updated October 27, 2026
Quick answer
Cool, not cold. Cenote water near Cancún stays at about 22 to 25 °C (72 to 77 °F) all year. Wikipedia gives about 25 °C (77 °F) for Dos Ojos, Rio Secreto says 22 to 24 °C (72 to 75 °F) in its cave river, and Yucatán Today says cenotes stay no warmer than 24 °C (75 °F). On a summer day, when Cancún's air reaches about 30 °C (86 °F), the water feels cold at first.
The temperature barely moves through the year because cenote water is groundwater, rain filtered slowly through the limestone, not sea or surface water that heats in the sun. That makes the water feel very different by season. In August Cancún's average high is 29.9 °C (86 °F), so climbing into 24 °C water is a shock for a minute. In January the average high is 25.5 °C (78 °F) and the low 22.6 °C (73 °F), so the water and the air are close, and getting out wet in a shaded cave is the cold part.
The temperature, source by source
The figures agree within about 3 °C. Where a source names one cenote, the figure is for that cenote.
- Sistema Dos Ojos, Tulum — About 25 °C (77 °F) year-round (Wikipedia).
- Gran Cenote, Tulum — About 25 °C (77 °F) all year (howisthesargassum.com, October 2026).
- Rio Secreto, Playa del Carmen — 22 to 24 °C (72 to 75 °F) in the underground river, on Rio Secreto's own site.
- Yucatán cenotes in general — No higher than 24 °C (75 °F) year-round (Yucatán Today, January 2026).
- Cenote Saamal, Valladolid — An average of 71.6 °F (22 °C), per Yucatán state tourism.
- Measured: Cenote Caletita, Cozumel — 24.7 °C (76.5 °F), measured by researchers from the Universidad Autónoma de Yucatán (Ingeniería, 2015).
How cold it feels by month
Cancún's climate normals (Open-Meteo, 1991 to 2020) put the average daily high at 25.5 °C (78 °F) in January, 28.6 °C (83 °F) in April and 29.9 °C (86 °F) in July and August, against water that stays at 22 to 25 °C. So the gap between air and water is widest from May to October, when the water feels most refreshing, and smallest from December to February, when a cloudy morning can make the swim feel chilly. Cave cenotes add shade: you lose the sun the moment you go underground.
Wetsuit or not
For a swim of an hour or so, the tours we list do not hand out wetsuits, and their what-to-bring lists ask for swimwear and a towel, not a wetsuit. The exception is the cave river: Rio Secreto supplies a 2.5 to 3 mm wetsuit, life jacket, helmet and lamp because you spend most of the tour in the water underground. Dive shops include the full scuba kit in their cavern-dive prices (Mexidivers, La Calypso). If you feel the cold, pack a rash guard or a light top for the swim and something warm for afterwards: one reviewer of the turtle and cenote tour advises a sweatshirt for the air-conditioned bus.
Pick a warm-day swim
If you want the cool water to feel like relief, go between late morning and mid-afternoon, after the air has warmed. Open cenotes such as Cenote Azul or Verde Lucero get direct sun; cave cenotes such as Suytun do not. The easiest way in is a cenote swim from Cancún: two cenotes at El Retoño with lunch and transport from $59, rated 4.9 on 75 reviews of this tour on GetYourGuide. All cenote tours from Cancún are compared on the hub.
Frequently asked questions
What temperature is cenote water in Fahrenheit?
About 72 to 77 °F. Wikipedia gives 77 °F for Dos Ojos, Rio Secreto 72 to 75 °F, and Yucatán Today no more than 75 °F.
Are cenotes warmer than the ocean?
We found no sourced sea-temperature figure to compare with. What the sources do show is that cenote water stays at about 22 to 25 °C all year, while Cancún's air averages a high of about 30 °C in summer.
Are cenotes colder in winter?
The water barely changes, since it is groundwater. The air does: Cancún's average January high is 25.5 °C (78 °F), close to the water temperature, so getting out feels cooler than in summer.
Do you need a wetsuit to swim in a cenote?
Not for a normal swim: none of the swim tours we list includes one. Rio Secreto supplies a 2.5 to 3 mm wetsuit for its underground river because you stay in the water for most of the tour.
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