A crested gecko in very cold weather needs a keeper who resists overcorrecting, because this New Caledonian species lives in a mild range that winter attacks from both sides. A cold window can chill one wall of the enclosure overnight, while the radiator blasting beneath it can cook and desiccate the same enclosure by day. Extra winter care is about placement, gentle background warmth only where the room truly fails, and humidity held steady against dry indoor air.
Placement is the crested gecko's first protection
Placement decides most of a crested gecko's winter, so move the enclosure away from exterior windows, doors that open to the cold, and direct radiator heat, into the most temperature-stable corner of the room. Check the reading at the gecko's mid-height perches morning and evening for a few days after moving it; a single midday reading hides the overnight low that actually matters. If one glass wall still chills, insulate that outside surface while leaving ventilation open, and keep the enclosure out of any sun patch that can spike a cold room's tank on a bright winter afternoon.
Gentle heat, never a hot spot
Gentle heat is the rule for a crested gecko, which has no basking lamp in its normal setup and suffers quickly in high temperatures. If the room cannot hold the gecko's usual mild range, add a low-output heat source on a thermostat, fixed to one side so a cooler retreat always exists, and verify the warmest perch stays within the range this species is comfortable in. Never improvise with a basking bulb borrowed from a dragon's setup or a heat mat turned up without control; an overheated crested gecko, limp and gaping on the glass, is an emergency for a veterinarian, not a setup tweak.
Humidity and drinking in dry heated air
Humidity is the crested gecko battle of the heating season, because the misting routine that sufficed in summer falls behind when radiators run all day. Mist in the evening so the gecko drinks droplets as it wakes, keep live plants or suitable substrate working for ambient moisture, and watch for the dry-air signs: a shed that sticks at the toes, a gecko that looks dull and stays low, or prepared diet left untouched night after night. A shallow water dish is worth offering even though most drinking happens from droplets, giving a dehydrated gecko a second route to water.
Appetite, activity, and what is seasonal
A crested gecko may eat a little less and move a little less in the darkest weeks, and that modest change, with stable weight, is not a concern by itself. Keep offering the prepared diet on the usual nights, note which flavours are taken, and weigh monthly, because a small gecko's losses hide easily. Refusal stretching across many offerings with visible thinning at the hips, a gecko that cannot grip or climb as it did, or shed repeatedly trapping the toes should prompt a call to a reptile veterinarian, with your winter temperature and feeding notes ready to describe.
Nightly jobs, clearly owned
Crested gecko winter care happens at night, when routines are easiest to forget or duplicate: the evening mist, the fresh diet dish, the low-temperature check. One shared list by the enclosure, ticked as each job lands, keeps a sleepy household honest. Through KinsLe, Care Teams lets you assign your crested gecko's misting, feeding, and temperature checks to whoever is home that evening, each marked complete with a timestamp.