Iguana Egg Incubation Calculator

Green iguana eggs take approximately 105 days to hatch on average, with a normal range of 90–120 days at a stable incubation temperature of 85–88°F.

Add 105 days to the lay date. Use the calculator above for an exact expected hatch date and the full 90–120 day normal range.

Gravid females need a deep dig site — in the wild they excavate tunnels several feet long and up to 2–3 feet deep in sandy or loose soil, often communally. In captivity, provide a nest box at least 24 inches deep with a sand/soil mix moist enough to hold a tunnel shape without collapsing.

A gravid female that stops digging or searching for a nest site for an extended period, along with straining, lethargy, and loss of appetite, can indicate egg binding (dystocia) — a veterinary emergency. Without an adequate nesting site, captive females are at meaningfully higher risk of becoming egg-bound.

A green iguana clutch typically contains 25 to 45 eggs, among the largest clutch sizes of any commonly kept reptile.

House hatchlings in a humid enclosure with a basking spot around 95°F and UVB lighting. Green iguanas are herbivores from hatching — offer finely chopped dark leafy greens, vegetables, and a calcium supplement; avoid feeding insects or animal protein.

Unlike many reptiles, green iguanas are strict herbivores at every life stage, including from hatching. Offer finely chopped collard greens, mustard greens, squash, and other calcium-rich vegetables dusted with a reptile calcium supplement.

At 105 days average, green iguanas incubate slower than bearded dragons (65 days) and crested geckos (90 days), but faster than monitor lizards (165 days) and most chameleon species.