Monitor Lizard Egg Incubation Calculator

Monitor lizard eggs take approximately 165 days on average to hatch, with a range of 150–180 days depending on species and incubation temperature (84–88°F).

Select your species from the calculator above and enter the lay date. Black Throat monitors run longest (up to 180 days), while Acanthurus and Savannah monitors are on the shorter end (150–180 days).

Monitor lizard eggs incubate best at 84–88°F (29–31°C) with 80–90% humidity in a well-ventilated incubation container using a moist substrate like vermiculite or perlite.

Savannah and Nile monitors average around 150–180 and 165 days respectively, Acanthurus monitors around 150 days, and Black Throat monitors — one of the largest monitor species — take the longest at around 180 days.

House hatchlings in a secure, appropriately sized enclosure with a strong basking spot (95–110°F depending on species) and UVB lighting. Offer appropriately sized insects (crickets, roaches) dusted with calcium starting within a few days of hatching.

Clutch size varies significantly by species and the female's size, generally ranging from around 7 to over 30 eggs per clutch in commonly kept species.

Healthy eggs stay firm to the touch and gradually enlarge over the incubation period. Eggs that collapse, discolor, or develop mold early on are typically non-viable and should be separated to avoid affecting neighboring eggs.

At 165 days average, monitor lizards incubate considerably longer than most lizards (bearded dragon 65 days, green iguana 105 days) but shorter than Panther Chameleons (240–300 days).