What temperature and humidity should I keep my green anole at?
Keep the basking spot at 85‑90°F (29‑32°C) and the cool side at 75‑80°F (24‑27°C), while maintaining 60‑70% humidity day and night.
Target temperatures, lighting, and humidity
Set the basking side to 85‑90°F (29‑32°C) and the cool side to 75‑80°F (24‑27°C). A 12‑hour light cycle with 10‑12% UVB at 12‑18inches from the lamp mimics the forest canopy. Keep the enclosure’s overall humidity between 60‑70% round‑the‑clock.
A 5‑gallon (19‑L) screen cage is enough for one adult, but give at least 12‑inches (30cm) of vertical space per inch of lizard length; a 24‑inch tall enclosure works well for a 6‑inch anole. Place branches at varying heights so the animal can thermoregulate by moving up or down. Use a ceramic heat emitter for night heating if the ambient room drops below 70°F (21°C).
- Basking spot: 85‑90°F (29‑32°C)
- Cool side: 75‑80°F (24‑27°C)
- UVB output: 10‑12% at 12‑18in
- Humidity: 60‑70% RH
Why a temperature gradient matters
Green anoles are arboreal micro‑thermoregulators; they chase sun patches in the morning and retreat to shade by afternoon. A single temperature reading would hide the microclimates they exploit, leading to stress or poor digestion. The gradient lets them choose the exact body temperature needed for feeding, shedding, and breeding.
When the basking spot hits 88°F (31°C) the lizard will stay there for 15‑20minutes to raise its body temperature, then hop to a 78°F (26°C) branch to avoid overheating. This back‑and‑forth creates a natural hormonal rhythm that supports healthy metabolism. If the gradient collapses, the animal may become lethargic or lose appetite.
Controlling temperature
A 50‑watt halogen basking bulb mounted 6‑inches (15cm) above the perch delivers the needed heat. Hook the bulb to a digital thermostat set to 88°F (31°C) and let the unit cycle on and off automatically. A ceramic heat emitter on a separate thermostat can provide night heat without light.
Place a calibrated thermometer at the lizard’s head height on the warm side and another on the cool side; read them twice daily, morning and evening. If the warm side drifts below 85°F, raise the bulb wattage by 10W or move it 1‑inch closer. If it exceeds 90°F, add a metal screen or increase the distance by 1‑inch to drop the temperature by roughly 2‑3°F.
Check the thermostat’s probe weekly for drift; a 2‑degree error can push the basking spot out of the safe range.
- Basking bulb: 50W halogen
- Thermostat setpoint: 88°F (31°C)
- Night heater: ceramic emitter ≤ 70°F (21°C)
Controlling humidity
A 2‑inch (5cm) layer of coconut fiber or sphagnum moss holds moisture without becoming soggy. Mist with a fine‑spray bottle 2‑3 times per day, aiming for droplets that disappear within 30‑45seconds. A shallow water dish holding ½‑gallon (2L) adds evaporative humidity without flooding the substrate.
A digital hygrometer placed on a mid‑height branch gives the true RH the anole experiences. If humidity falls under 60%, increase mist frequency or add a second dish. If it climbs above 70%, improve ventilation by widening the top screen by 1‑inch or installing a low‑speed exhaust fan.
Rotate the misting nozzle each session to avoid water pooling on one side; uneven humidity can cause localized mold.
- Substrate depth: 2‑inch
- Misting frequency: 2‑3×/day
- Target RH: 60‑70%
Observable signs of imbalance
If the enclosure is too hot, the anole will gape, hold its tail stiff, and display a darker, almost black coloration. It may also spend most of the day under the basking lamp and become sluggish when removed.
When too cold, the lizard will linger on the cool side, turn a pale green or almost white, and refuse food for 24‑48hours. Reduced activity and a slower heart rate are common clues.
Humidity problems show up as incomplete sheds, white patches on the skin, or fungal growth on the substrate. Weight loss of more than 5% in a month signals chronic dehydration.
- Over‑heat: mouth gaping, dark color
- Under‑heat: pale color, appetite loss
- Low RH: stuck shed, weight loss
Keep reading about Green Anole: Green Anole care sheet
Related questions
How often should I replace the UVB bulb?
Replace the UVB bulb every 6‑12 months; output typically drops after about 9 months, so mark the install date and set a calendar reminder.
What size enclosure is safe for a juvenile green anole?
A 10‑gallon (38‑L) screen cage with at least 12‑inch (30cm) height works until the juvenile reaches 4‑inches; then upgrade to a 24‑inch tall enclosure to maintain the proper gradient.
Can I use a heat mat under the enclosure?
Avoid direct heat mats because they create a hot spot that can scorch the substrate. If you must, use a thermostatically controlled mat set to 80°F (27°C) and cover it with a ¼‑inch cork sheet to diffuse the heat.
Not veterinary advice. This guide covers husbandry — housing, feeding, cleaning and handling. If your green anole is injured, off food unusually long, or behaving abnormally, contact a veterinarian.