Crested Gecko Temperature Requirements: Full Care Guide

TL;DR: Crested geckos thrive at 72–78°F (22–26°C) — significantly cooler than most reptiles — and can be fatally harmed by sustained temperatures above 85°F (29°C), which can kill within hours. Unlike bearded dragons or monitors, crested geckos do not need a hot basking spot; they thermoregulate by moving between warmer and cooler areas of their arboreal enclosure. If your room consistently stays between 70–78°F, no supplemental heating equipment is needed at all — this is one reason crested geckos are popular beginner reptiles.

Crested geckos are unusual in the reptile world: they actually prefer cooler temperatures than most lizards. Get the temps wrong — especially too hot — and you'll have a stressed, sick gecko on your hands fast.

This guide covers every temperature question crested gecko owners ask, from ideal daytime ranges to winter lows and summer danger zones.

Ideal Temperature Range for Crested Geckos

Crested geckos thrive at 72–78°F (22–26°C) during the day. At night, they can tolerate a drop down to 65–70°F (18–21°C). This is significantly cooler than most reptiles people keep.

Why the cooler preference? Crested geckos (Correlophus ciliatus) are native to New Caledonia, a tropical island in the South Pacific. The forests there are warm but not hot — daytime highs rarely exceed 80°F even in summer. The geckos evolved for these conditions over millions of years.

The Temperature Sweet Spot

Note: Unlike bearded dragons or blue tongue skinks, crested geckos do not need a hot basking spot. They are arboreal and thermoregulate by moving between sunny and shaded areas of their enclosure — not by pressing against a hot rock.

What Temperature Is Too Cold for a Crested Gecko?

Short-term drops to 60°F (15°C) are usually tolerable for healthy adults. However, prolonged exposure to temperatures below 65°F will slow their metabolism dangerously, suppress their immune system, and cause them to stop eating.

Hatchlings and juveniles are more sensitive. Keep young geckos at 72°F minimum, even at night.

If your room drops below 65°F in winter, you need a low-wattage heat source — see the heating section below.

What Temperature Is Too Hot for a Crested Gecko?

This is the bigger danger for most keepers. 82°F (28°C) is the upper safe limit. Sustained temperatures above this cause heat stress. Above 85°F (29°C) for several hours, you risk heat stroke and death.

Crested geckos cannot cool themselves down the way mammals can. They don't sweat. They don't pant effectively. Once the ambient temperature exceeds their safe zone, their only option is to hide in the coolest spot available and wait.

In summer, many keepers face real problems with enclosures that heat up during the day. See the summer heat section below for solutions.

Do Crested Geckos Need a Heat Lamp?

In most homes, no. If your room stays between 70–78°F year-round, no heating equipment is needed at all. Room temperature is enough.

That said, there are cases where supplemental heat helps:

• Cold winters: Rooms that drop below 65°F at night need a small heat source.
• Basking enrichment: Some keepers add a low-wattage incandescent bulb (25–40W) to create a gentle warm spot. This is optional, not required.

If you do add heat, use a low-wattage bulb or a small ceramic heat emitter (CHE). Never use a heat mat under a crested gecko enclosure — their enclosures are tall and arboreal; heat rises from below and can create a dangerously hot lower zone.

What Lights Are Best for Crested Geckos?

Crested geckos are crepuscular-to-nocturnal (most active at dawn, dusk, and night). They don't need intense UVB like a bearded dragon does, but they do benefit from it.

UVB for Crested Geckos

Recent research shows that low-level UVB (5.0 or T5 HO 6%) helps crested geckos synthesize vitamin D3 naturally and reduces reliance on dietary supplementation. The setup isn't complex:

• Use a T5 HO 6% or Arcadia ShadeDweller UVB bulb
• Mount it inside the enclosure or within 6–8 inches of the top screen
• Run it 10–12 hours per day

Basic LED or T8 Lighting

If you're keeping the enclosure in a room with natural light cycles, a simple LED plant light on a timer is enough to keep live plants alive and give your gecko a day/night rhythm. Avoid lights that produce much heat.

Do Crested Geckos Need Night Lights?

No. In fact, light at night is actively harmful. Crested geckos are sensitive to light exposure, and constant or nighttime light disrupts their circadian rhythm, increases stress, and interferes with breeding behavior.

If you want to watch your gecko at night, use a red or dim moonlight LED. These wavelengths are largely invisible to crested geckos and won't disturb them.

Heating for Hatchling Crested Geckos

Hatchlings follow the same temperature rules as adults with a tighter tolerance. Keep hatchlings at 72–76°F at all times. Don't let it drop below 70°F at night for the first 3–4 months.

A small radiant heat panel or low-wattage CHE connected to a thermostat provides gentle background warmth without risk of overheating. Always use a thermostat — never plug a heat source directly into the wall.

Managing Summer Heat

Summer heat is the number-one killer of crested geckos in captivity. Here are practical solutions:

Move the enclosure to the coolest room. Basements and interior rooms stay naturally cooler. A few degrees difference can matter a lot.

Use an air conditioner. If your home gets above 80°F regularly, run AC to keep the reptile room cooler. This is the most reliable solution.

Ice packs. In a pinch, place a large ice pack against one side of the enclosure for a few hours during peak heat. This creates a cool zone the gecko can move toward. Replace every few hours.

Frozen water bottles. Same principle as ice packs — place near (not inside) the enclosure for spot cooling.

Misting. Misting the enclosure walls with cool water causes evaporative cooling. Don't overdo it — crested geckos need humidity of 60–80%, but standing water causes bacterial problems.

Avoid direct sunlight on the enclosure. Even indirect afternoon sun through a window can heat a glass enclosure by 10–15°F in under an hour.

Thermometers: What to Use

You need a reliable thermometer. Avoid the cheap stick-on dial thermometers that come bundled with cheap starter kits — they're often inaccurate by 5–10°F.

Best options:

• Digital probe thermometer: Accurate, inexpensive. Place the probe at the level where your gecko spends most of its time (mid-enclosure, not at the bottom or top).
• Infrared temperature gun: Good for spot-checking surface temps. Useful if you have a basking area.
• Data logger: If you want to track overnight temp swings, a WiFi-enabled data logger records temps over time and alerts you to unusual drops or spikes.

Temperature and Humidity: The Connection

Crested geckos need 60–80% relative humidity. Temperature and humidity are linked — colder air holds less moisture. If you're heating the enclosure, you may need to mist more often to maintain humidity.

The ideal cycle: mist the enclosure in the evening when temps drop. The cool, humid air mimics natural forest conditions. Let it dry out partially by morning. This wet-dry cycle keeps the respiratory environment healthy and triggers natural feeding behavior.

Signs of Temperature Stress in Crested Geckos

Too hot:

• Hiding constantly and refusing to come out
• Gaping mouth (attempting to pant)
• Lethargy during evening active period
• Loss of appetite
• Waxy or sunken appearance

Too cold:

• Sluggish movement even at night
• Refusal to eat for multiple feedings in a row
• Staying on the enclosure floor instead of climbing
• Slow digestion (food stays visible in the belly)

If you see these signs, check temps first before assuming illness. Temperature is the most common cause of behavioral changes in crested geckos.

Quick Temperature Reference

Summary

Crested geckos are low-maintenance when it comes to heating — most keepers don't need any special equipment at all. The key rules are simple: stay between 72–78°F, never let it hit 82°F+, and if your room is cold in winter or hot in summer, plan for it before it becomes a crisis. A digital thermometer and a basic heat source (when needed) are all you need.