Tortoise Brumation Calendar
Select your species to see which months it brumates and get guidance on preparation, care during brumation, and post-brumation emergence.
🍂 Pre-brumation prep(Sep)
- Gradually reduce feeding 3–4 weeks before brumation begins
- Allow the tortoise to empty its digestive tract fully (critical — food rotting in the gut during brumation can be fatal)
- Provide consistent access to water for soaking
- Begin lowering temperatures gradually
- Schedule a vet check if it's your first brumation or animal's health is uncertain
❄️ Brumation(Oct, Nov, Dec, Jan, Feb, Mar)
- Target temperature: 3–10°C (38–50°F) for most tortoise species
- Check on your tortoise every 2–3 weeks without disturbing it
- Offer water every 4–6 weeks (do not feed)
- Weigh monthly — weight loss exceeding 1% per month warrants a vet call
- Maintain humidity to prevent dehydration
🌱 Emergence(Apr)
- Warm up gradually over 1–2 weeks — do not rush
- Offer a warm soak within 24 hours of emergence to rehydrate
- Wait until the tortoise is actively moving before offering food
- Start with easily digestible foods and reintroduce the full diet over 1–2 weeks
- Weigh and note any health concerns — post-brumation vet checks are recommended
About brumation
Brumation is the reptilian equivalent of hibernation — a period of dramatically reduced metabolic activity triggered by falling temperatures and shorter daylight hours. Unlike mammalian hibernation, brumating tortoises may periodically wake to drink water but do not eat.
Which species brumate?
Species originating from temperate regions with cold winters require brumation as a natural part of their annual cycle. This includes the Russian Tortoise (Agrionemys horsfieldii), Hermann's Tortoise (Testudo hermanni), and related Mediterranean species. Tropical species such as Red-footed Tortoises do not brumate and should be kept warm year-round.
Risks of skipping brumation
For species that naturally brumate, skipping this cycle can cause hormonal disruption, reduced breeding success, and some evidence suggests it may shorten lifespan in the long run. However, first-year hatchlings and animals in poor health should generally not be brumated.
When not to brumate
- Animals under 3 years old or under 200g
- Any animal with active illness, parasites, or injury
- Animals that have not fed and gained weight through the preceding active season
- Any animal whose health status is uncertain — vet check first
Frequently asked questions
What temperature should I keep my tortoise during brumation?
Most temperate tortoise species brumate safely at 3–10°C (38–50°F). Temperatures above 10°C may cause the tortoise to remain partially active and burn through fat reserves without eating. Temperatures below freezing are dangerous.
How long can tortoises go without eating during brumation?
During true brumation at correct temperatures, tortoises can go the entire brumation period (months) without eating. Their metabolism drops dramatically. Offering food during brumation is unnecessary and potentially harmful if the digestive tract is not warm enough to process it.
My tortoise came out of brumation early — what should I do?
Gradually warm the enclosure and offer a warm soak within 24 hours to rehydrate. Wait until the tortoise is active and alert before offering food. If it seems lethargic or unwell, consult a reptile vet promptly.
What to feed after emergence? Check species-specific food safety verdicts with citations. Browse species →
This tool is for informational purposes only and does not constitute veterinary advice. Always consult a qualified reptile veterinarian before attempting brumation, especially for animals in uncertain health.