What Temperature and Humidity Do Crested Geckos Need?
The crested gecko is the rare reptile that is easier to overheat than to keep warm. Native to the cool, humid forests of New Caledonia, it does best in the same temperatures a person finds comfortable. Many new keepers add a heat lamp out of habit and cook a gecko that needed nothing more than a shaded room and a misting bottle. With this species, restraint is the husbandry skill.
What temperature do crested geckos need?
Keep crested geckos at 72 to 78F during the day, with a safe nighttime drop into the high 60s. Avoid sustained temperatures above 82F, since heat stress sets in around the mid-80s and can be fatal. Most homes sit in range without any heat source, so the priority is preventing overheating rather than adding warmth.
Because crested geckos do not bask, a bright overhead heat lamp is usually a hazard, not a help. If a room runs cold, a low-wattage ceramic heat emitter or deep heat projector on a thermostat can gently raise ambient temperature, but it must be capped well below the danger zone. In summer, the real risk is a tank near a sunny window climbing into the high 80s, which is an emergency for this species.
What humidity do crested geckos need?
Aim for a daily cycle: 50 to 70 percent through the day, rising to 80 to 90 percent at night after an evening misting, then drying back down before the next mist. This wet-then-dry rhythm mirrors the forest and prevents the constant dampness that causes skin and respiratory problems. A digital hygrometer confirms the swing.
The drying-out phase is as important as the misting. A tank that never dries promotes bacterial and fungal growth and can lead to respiratory infection. Bioactive setups with live plants and a drainage layer hold this cycle naturally, while a bare tank needs hand misting once or twice a day. Crested geckos drink the droplets off leaves and glass, so the evening mist also serves as their main water source.
Why are crested geckos so sensitive to heat?
Crested geckos evolved in the cool, shaded canopy of New Caledonia, where temperatures rarely spike. They have little tolerance for sustained heat, and exposure above the mid-80s causes overheating, refusal to eat, lethargy and death. This makes them unusual among reptiles, since most need added warmth while crested geckos mainly need protection from it.
Practical heat safety means keeping the tank out of direct sun, away from radiators, and ventilated in summer. A digital thermometer with a high-temperature alert, or a logged daily reading, catches a dangerous climb before the gecko suffers. If a tank hits the high 80s, move it to the coolest room, increase airflow, and avoid misting with warm water, which only adds heat and humidity stress.
What are the target crested gecko ranges at a glance?
Use these targets: daytime temperature 72 to 78F, nighttime high 60s, with an upper limit around 82F. Daytime humidity 50 to 70 percent, nighttime humidity 80 to 90 percent after misting. Provide a tall enclosure with branches, foliage and cover, since this is an arboreal, nocturnal species that climbs and hides.
| Parameter | Safe range | Notes |
|---|---|---|
| Daytime temperature | 72 to 78F | Room temperature, no basking lamp |
| Nighttime temperature | High 60s | Natural cool drop is fine |
| Upper limit | ~82F | Heat stress above the mid-80s |
| Daytime humidity | 50 to 70% | Allow it to dry between mists |
| Nighttime humidity | 80 to 90% | After evening misting |
Key takeaways
- Keep crested geckos at 72 to 78F and never let the tank sit in the mid-80s.
- Heat stress, not cold, is the main temperature danger for this species.
- Cycle humidity from 50 to 70 percent by day up to 80 to 90 percent at night.
- Let the enclosure dry between mists to avoid respiratory and skin problems.
- Provide a tall, planted enclosure since crested geckos are arboreal and nocturnal.
Frequently asked questions
- Do crested geckos need a heat lamp?
- Usually no. Crested geckos thrive at room temperature and do not bask, so a heat lamp often pushes the tank into a dangerous range. Only if your room runs cold, below the high 60s, should you add gentle ambient heat from a thermostat-controlled ceramic emitter capped well under 82F. Most keepers need no supplemental heat at all.
- Do crested geckos need UVB?
- It is optional but increasingly recommended. As crepuscular geckos they can do well on a diet that includes vitamin D3, but a low-level UVB bulb supports calcium metabolism and natural behavior. If you add UVB, use a low-output bulb suited to a shade-dwelling species and provide cover so the gecko can move out of the light.
- How often should I mist a crested gecko tank?
- Typically once or twice a day, with a heavier mist in the evening to raise nighttime humidity toward 80 to 90 percent. Let the tank dry back to 50 to 70 percent before the next mist. The exact schedule depends on your room, ventilation and whether the setup is bioactive. Track humidity to fine-tune the rhythm.
- What temperature is too hot for a crested gecko?
- Sustained temperatures above roughly 82 to 85F are dangerous, and the higher into the 80s it climbs, the greater the risk of fatal heat stress. Signs include lethargy, hiding low in the tank, refusing food and open-mouth breathing. If the tank overheats, move it to the coolest room and increase airflow immediately.
Exotic Pet Husbandry Research, BigBalli. We translate species care sheets into daily, trackable numbers, cross-checked against sources including VCA Hospitals and the RSPCA.
Crittora provides husbandry and educational information, not veterinary diagnosis or treatment. A gecko showing heat stress, weight loss or labored breathing should be seen by a qualified reptile or exotic vet.